Hudson's FTM Resource Guide

FTM Testosterone Therapy and General Health

The information contained herein is to be used for educational purposes only. The author is not a medical professional, and this information should not be considered medical advice. This information should NOT be used to replace consultation with or treatment by a trained medical professional. The listing of a medication herein does not imply endorsement by the author.

Please keep in mind while reading this section that the reference values/ranges listed for various blood tests may vary slightly from lab to lab. Always be sure to discuss test results with your doctor.



Overview of testosterone
delivery methods


Serum total testosterone test

Complete blood count (CBC)

Liver function tests (LFT)/
Liver enzymes

Clotting factors test

Lipid profile test
(cholesterol, triglycerides)

Blood pressure (BP) test

Pap smear/Pelvic exam


Increased red blood cell (RBC) count

Increased hemoglobin (HGB)

Increased hematocrit (HCT)


Elevated liver levels & potential liver conditions

Suppression of clotting factors

Elevated lipid profile/High cholesterol

High blood pressure




Miscellaneous other side effects: nausea, headache, anxiety, depression, or generalized paresthesia


Yeast infections and
Bacterial vaginosis

Self "chest" exams
(for breast-tissue cancer)

PCOS and ovarian and endometrial cancers

Conversion of excess testosterone into estrogen

Allergic reactions

Heart-healthy diet
and exercise

Fertility options:
egg banking


As with most medications and supplements-- even hormones such as testosterone-- adding exogenous doses will have an effect on overall health and balance of systems in the body. While testosterone has many beneficial effects for trans men, there are health issues that may arise from testosterone usage that should be monitored carefully by you and your doctor.

This chapter is divided into four sections. First is a short overview of testosterone delivery methods. Second is a summary of the type of laboratory tests your doctor will use to monitor your health, as well as the general range of test values you should expect from such tests. Third is a list of potential health complications and issues that may arise when using testosterone. Fourth is a list of other health issues to consider with testosterone use. This information is provided as a starting point, so that you may be aware of potential problems and speak to your doctor intelligently regarding your health.

Overview of testosterone delivery methods
In FTM testosterone therapy, testosterone (often called "T" for short) can be administered into the body in a number of ways. The most common method is intramuscular injection with a syringe. Other delivery methods include transdermal application through a gel, cream, or patch applied to the skin; orally by swallowing tablets (this method is uncommon, as oral delivery of C-17 alpha alkylated testosterone has been associated with negative effects on the liver); sublingually/buccally by dissolving a tablet under the tongue or against the gums; or by a pellet inserted under the skin. The T delivery method used will depend on the type of medication available in the country of treatment, the health risks/benefits for the patient, personal preference, and cost.

Testosterone is not stored by the body for future use, so in order to maintain healthy levels it must be administered in timed intervals and in appropriate dosages. Injectable and subcutaneous T pellets remain active in the body the longest. Injectable T is typically administered between once a week to once every three weeks, and subcutaneous T pellets are replaced every 3-4 months. Transdermal T (patch, gel, or cream) is typically applied to the skin in smaller daily doses; oral and sublingual/buccal T are also typically taken daily. (For more information on different types of testosterone and dosages, click here.)

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In order to monitor your health while taking testosterone, your doctor will perform a variety of tests in the laboratory-- mostly blood tests. During the first year of testosterone therapy, your doctor should perform blood tests every three or four months. This will be especially helpful in determining an appropriate T dose, as the data found in the blood tests can be used to adjust your dosage and/or timing if necessary. If no major problems arise in your bloodwork during the first year of treatment, blood tests can be taken every six months during the second year. Once into the third year of treatment, blood tests can be performed once per year if no complications arise.

Some of the important lab tests that your doctor should perform are listed below. Please keep in mind while reading this section that the reference values/ranges listed for various blood tests may vary from lab to lab. Always be sure to discuss test results with your doctor. Also remember to ask your doctor if there are any special preparations for a specific test (such as fasting beforehand or drinking plenty of fluid), and be sure to tell your doctor about all medications and supplements you may be taking, as these factors may effect the test results.

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Serum total testosterone test
An individual's testosterone levels are usually confirmed through a blood test called a "serum total testosterone test." Testosterone exists in your bloodstream in two forms-- "bound" testosterone and "free" testosterone. The majority of bound testosterone in the body is chemically bound to a protein called "sex hormone binding globulin" (SHBG). The remaining bound testosterone in the system is mostly bound to albumin, another protein. Free testosterone is not chemically attached to any proteins and is considered the "active" form of testosterone, as it is readily available to bind to androgen receptor sites on cells.

A serum total testosterone test measures the total of bound and free T in the system. What is considered a normal test level of combined bound and free testosterone in male bodies can range anywhere from 300-1100 ng/dl (nanograms per deciliter). Levels will vary with age and individual factors.

It is useful to also separately measure the level of free testosterone in the system, as this may be more indicative of how hormone therapy is progressing. Levels of free testosterone can range between 0.3%-5% of the total testosterone count, with about 2% considered an average level. Ask your doctor to check for both total and free levels of testosterone in your system.

Remember that because every body has a different sensitivity to androgens, T levels themselves will not necessarily indicate results in terms of masculinization. The levels are merely a guideline by which you and your doctor can begin to measure progress. Your results and your dosing should be guided by your overall health (especially the health of your heart and liver), your progress in masculinization, and how your body and moods react to different dosages. Testosterone therapy is not a one-size-fits-all approach-- be sure to monitor your health and feelings closely, and remember that even a small adjustment in dosage (in either direction) can make a big difference. Your doctor should rely on the tests below to monitor your overall health.

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Complete blood count (CBC)
A complete blood count (CBC) test usually measures the following:
* Number of red blood cells (RBCs)
* Number of white blood cells (WBCs)
* Total amount of hemoglobin (HGB) in the blood
* The fraction of the blood composed of red blood cells (hematocrit or HCT)
* The mean corpuscular volume (MCV-- the size of the red blood cells, derived from MCV = HCT/HGB)
(The platelet count is often also included)

Reference levels for RBC, hemoglobin, and hematocrit will vary between male and female bodies. Once a trans man has begun testosterone therapy, common wisdom is to compare his CBC levels to reference ranges for male-bodied individuals. Values for males, where different from females, are noted below. Keep in mind that the reference levels/values listed for tests may vary from lab to lab.

RBC (males): 4.7 to 6.1 million cells/ul (cells per microliter)
WBC: 4,500 to 10,000 cells/ul
Hemoglobin (males): 13.8 to 17.2 gm/dl (grams per deciliter)
Hematocrit (males): 40.7 to 50.3%
MCV: 80 to 95 femtoliter
(Please note that RBC, hematocrit, and hemoglobin levels can also vary by altitude.)

Of the levels listed above, RBC, hemoglobin, and hematocrit should be monitored closely during testosterone therapy. Those levels will be discussed below in further detail.

Red blood cell (RBC) count
Red blood cells, or "erythrocytes," transport hemoglobin. Hemoglobin transports oxygen to body tissues. RBCs normally survive about 120 days in the blood, after which they are removed by the spleen and liver.

Reference values for RBCs in males: 4.7 to 6.1 million cells/ul (cells per microliter)

Testosterone has been reported to stimulate the production of red blood cells. For trans men, RBCs will typically be raised into the male range, but ideally should not be raised past the high end of that range.

Hemoglobin (HGB)
Hemoglobin, as mentioned above, is a protein that carries oxygen in the blood. It also carries carbon dioxide from the tissues to the lungs to be exhaled. HGB is contained in red blood cells.

Reference vales for HGB in males: 13.8 to 17.2 grams/dl (grams per deciliter)

Testosterone has been reported to stimulate the production of HGB. For trans men, HGB levels will typically be raised into the male range, but ideally should not be raised past the high end of that range.

Hematocrit (HCT)
The hematocrit is the percentage of whole blood that is composed of red blood cells. It is a measure of both the number of RBCs as well as their size. HCT indicates the proportion of cells and fluids in the blood-- when HCT levels are too high, the blood is becoming too thick, which can cause a variety of complications.

Reference values for HCT in males: 40.7 to 50.3% of the blood.

As testosterone has been reported to stimulate the production of RBCs, it also can raise the HCT level. For trans men, the HCT percentage will typically be raised into the male range, but ideally should not be raised past the high end of that range.

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Liver function tests (LFT)/Liver enzymes
There are a number of blood tests that are used to evaluate liver function. Such tests measure the levels of certain enzymes and/or other substances in the blood, the presence of which may indicate damage to the liver or other vital tissues. Because liver health can be affected by the use of testosterone (and because testosterone is metabolized in the liver), your doctor may monitor your "liver enzymes" or "liver levels" using some or all of the tests listed below.

Common tests that measure for specific enzymes include: AST (aspartate aminotransferase, sometimes also called SGOT), ALT (alanine aminotransferase, sometimes also called SGPT), ALP (alkaline phosphatase), and GGT (gamma glutamyl transferase). Other tests that are used to evaluate liver function include: Albumin, Bilirubin, and PT (Prothrombin time, an evaluation of clotting in the blood).

Details of these tests are listed below. Keep in mind that the reference levels/values listed for tests vary from lab to lab.

Aspartate aminotransferase (AST)
(Also sometimes called serum glutamic-oxaloacetic transaminase [SGOT])

Aspartate aminotransferase (AST) is an enzyme found in high concentrations in the red blood cells, the liver, heart cells, and muscle tissue, and in lesser concentrations in the pancreas, the kidneys, and other tissues. When body tissue or an organ such as the heart or liver is compromised, additional AST is released into the bloodstream. The amount of AST found in the blood is directly related to the extent of the tissue damage. AST is often measured in combination with other enzyme levels such as ALT and ASP to monitor liver disease.

Strenuous exercise can affect aspartate aminotransferase (AST) test results; avoid strenuous exercise just before having this test done. Some drugs and supplements can also interfere with the results of this test. Speak with your doctor about all medicines you may be taking, including vitamins and herbal supplements.

Reference values for AST: 0 to 35 IU/l (international units per liter)

Keep in mind that abnormal levels for this test may arise from a variety of different causes, and cannot automatically be assumed to be caused by liver disease.

Alanine aminotransferase (ALT)
(Also sometimes called serum glutamate pyruvate transaminase [SGPT])

Alanine aminotransferase (ALT) is an enzyme involved in the metabolism of alanine, an amino acid. ALT is present in a number of tissues but is in highest concentration in the liver. If the liver is injured, ALT is released into the blood.

Reference values for ALT: 5 to 35 IU/l (international units per liter)

Normal range can vary according to a number of factors, including age, race, and sex. Consult your physician or lab for interpretation.

Alkaline phosphatase (ALP)
Alkaline phosphatase (ALP) is an enzyme found in all tissues, but is found in particularly high concentrations in the liver, the bile ducts, placenta, and bone.

Damaged or diseased tissue releases ALP into the blood. ALP levels in the blood may also increase in some normal circumstances or in response to a variety of drugs. There are multiple types of ALP, each with a different structure, called isoenzymes. Different isoenzymes are found in different tissues. In order to differentiate the location of damaged or diseased tissue in the body, ALP isoenzyme testing must also be done in the laboratory.

Reference values for ALP: 30 to 120 IU/l (international units per liter).

Normal values can vary with age and sex. Consult your physician or lab for interpretation.

Gamma glutamyl transferase (GGT)
GGT is active in the transfer of amino acids across cellular membranes and in glutathione metabolism. High concentrations of GGT are found in the liver, the bile ducts, and the kidney.

GGT is usually measured in combination with other liver enzyme levels such as ALP. Comparison between the enzyme levels is useful in differentiating liver or bile duct disorders from bone disease.

Reference values for GGT: 0 to 51 IU/l (international units per liter)

Normal values for this test vary widely, and depend on the age and sex of the individual. Consult your physician or lab for interpretation.

Albumin is a protein that transports many small molecules in the blood, including bilirubin, calcium, progesterone, and drug chemicals. It also helps maintain the oncotic pressure of the blood.

Albumin is synthesized by the liver; decreased serum albumin may result from liver disease. It can also result from kidney disease, malnutrition, or a low protein diet.

Reference values for albumin: 3.4 to 5.4 g/dl (grams per deciliter)

Bilirubin is a breakdown product of hemoglobin. Red blood cells contain hemoglobin, which is broken down into the components "heme" and "globin." Heme is converted into bilirubin. Albumin carries bilirubin to the liver, where most of it is conjugated with a glucuronide before it is excreted in the bile. Conjugated bilirubin is called "direct bilirubin;" unconjugated bilirubin is called "indirect bilirubin." Total bilirubin equals direct bilirubin plus indirect bilirubin.

Total and direct bilirubin are usually measured to screen for liver disease or gall bladder/bile duct dysfunction.

Reference values for total bilirubin: 0.1-1.0 mg/dl (milligrams per deciliter)
Reference values for indirect bilirubin: 0.2-0.8 mg/dl
Reference values for direct bilirubin: 0.1-0.3 mg/dl

Prothrombin time (PT or Pro-time)
This is a test that measures the clotting time of plasma (the liquid portion of the blood).

Blood clotting involves several proteins known as "coagulation factors," which are individually numbered with roman numerals (i.e., Factor I, Factor II, Factor V, Factor X, etc.) The liver produces these proteins and secretes them into the blood. Blood clotting begins when some of the coagulation factors contact damaged tissue. Each factor reaction triggers the next reaction, in a cascade. The final product of the coagulation cascade is the blood clot.

The PT test measures the clotting ability of factors I (fibrinogen), II (prothrombin), V, VII, and X. When any of these factors is deficient, the PT is prolonged. In addition to screening for clotting/bleeding disorders, the PT test can also be an indicator of liver and bile duct disease.

Reference values for PT: 9 to 12 seconds

Normal values will vary somewhat in different labs, and will be higher for individuals on anticoagulent therapy.

Testosterone has been reported to suppress clotting factors II, V, VII, and X. As the PT test is a measure of the clotting ability of those specific factors as a group, it is an important screening test for those individuals taking testosterone.

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Clotting factors test
Additional clotting factor testing is usually done as a follow-up to an abnormal Prothrombin time (PT) test. In clotting factor testing, the suspected coagulation factor deficiencies are further tested individually. Functional (activity) testing and quantity (antigen) testing can help determine which factor(s) are affected and how severely. Antigen testing is not available for all the clotting factors.

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Lipid profile tests (Cholesterol, Triglycerides)
The lipid profile is a group of tests that help determine risk of coronary heart disease. It includes total cholesterol, HDL cholesterol (High Density Lipoprotein or "good" cholesterol), LDL cholesterol (Low Density Lipoprotein or "bad" cholesterol), and triglycerides.

Cholesterol is a soft, waxy substance present in all parts of the body including the nervous system, skin, muscle, liver, intestines, and heart. It is both made by the body and obtained from certain foods. Cholesterol is manufactured in the liver and is transported in the blood to body tissues.

Cholesterol measurements are typically broken down into three categories: HDL cholesterol (often called "good cholesterol"), LDL cholesterol (often called "bad cholesterol") and total cholesterol. The lower your LDL cholesterol, the lower your risk of heart attack and stroke. It is also important to maintain a high enough level of HDL, or "good" cholesterol. Desirable cholesterol levels, according to the American Heart Association, are listed below.

Levels for Total cholesterol:
Desirable: less than 200 mg/dl (milligrams per deciliter)
Borderline high risk: 200 to 239 mg/dl
High Risk: 240 mg/dl and above

Levels for LDL cholesterol:
Optimal: less than 100 mg/dl (milligrams per deciliter)
Near Optimal/Above Optimal: 100 to 129 mg/dl
Borderline high: 130 to 159 mg/dl
High: 160 to 189 mg/dl
Very High: 190mg/dl and above

Levels for HDL cholesterol:
Average woman: 50 to 60 mg/dl (milligrams per deciliter)
Average man: 40 to 50 mg/dl
Low: less than 40 mg/dl

Testosterone therapy may contribute to the elevation of LDL (bad) cholesterol and the lowering of HDL (good cholesterol).

Triglycerides are the chemical form in which most fat exists in food as well as in the body. They are the most common type of fat in the body, and serve as a major source of energy. The triglycerides that are present in the blood plasma are derived from fats eaten in foods or are made in the body from other energy sources like carbohydrates. Calories eaten in a meal that are not used immediately by tissues for energy are converted to triglycerides and transported to fat cells to be stored. Triglycerides are released as needed from fat tissue so they meet the body’s needs for energy between meals.

Since triglycerides are circulating forms of fat, one might think that a high fat diet would raise triglycerides. However, carbohydrate appears to be the most important dietary predictor of triglycerides. Diets high in carbohydrates, especially sugar, lead to increases in triglycerides.

Triglyceride level classification
Normal: Less than 150 mg/dl (milligrams per deciliter)
Borderline high: 150-199 mg/dl
High: 200-499 mg/dl
Very high: 500 mg/dl or higher

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Blood pressure (BP) test
A blood pressure reading is typically presented in two component measurements: systolic pressure over diastolic pressure. Systolic pressure is the pressure of the blood flow when the heart beats (the pressure when the first sound is heard). Diastolic pressure is the pressure between heartbeats (the pressure when the last sound is heard). The harder it is for blood to flow, the higher the numbers will be.

Classification of blood pressure for adults:
Normal-- Systolic: less than 120 mm Hg; Diastolic: less than 80 mm Hg (millimeters of mercury)
Prehypertension-- Systolic: 120-139 mm Hg; or Diastolic: 80-89
Stage 1 Hypertension-- Systolic: 140-159 mm Hg; or Diastolic: 90-99
Stage 2 Hypertension-- Systolic: 160 mm Hg or higher; or Diastolic: 100 mm Hg or higher

When a person's systolic and diastolic pressures fall into different categories, the higher category is used to classify the blood pressure status. Diagnosing high blood pressure is based on the average of two or more readings taken at two or more visits after an initial screening.

"Hypertension" is a term that means abnormally high blood pressure, even when at rest.

Testosterone therapy may contribute to raising blood pressure levels.

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Pap smear/Pelvic exam

A large portion of trans men are extremely uncomfortable with having female genitalia and/or reproductive organs. Though a percentage of trans men may have their uteruses and/or ovaries surgically removed, and may also have genital surgery, others do not have those surgeries at all.

Those trans men who still have their uteruses and ovaries should have regular pelvic exams with Pap smears. If a trans man is having or has had any kind of penetrative sex in the vaginal opening, Pap smears should be performed regularly (usually every year or every two years, depending on test results and sexual activity). As uncomfortable as this may be, it is a wise choice. Regular Pap smears can identify pre-cancerous cells on the cervix in their early stages, in time for treatment.

Routine Pap smears can be performed in a general practitioner's office-- the patient need not go to a ob/gyn or "woman's clinic" if he is not comfortable doing so.

During a Pap test, a sample of cells is taken from the cervix and spread on a microscope slide. The cells are examined under a microscope in order to look for pre-malignant (pre-cancerous) or malignant (cancerous) changes.

In most cases, a Pap test can identify cellular abnormalities in the cervix before they become malignant. The Pap smear is intended to help diagnose cervical cancer; it is not intended to detect other forms of cancer such as those of the ovary, vagina, or uterus. Cancer of these organs may be discovered during the course of the pelvic exam, which usually is done at the same time as the Pap smear.

Both smoking and the human papilloma virus (HPV) can increase the risk of an abnormal Pap smear result. There are many types of sexually transmitted HPV viruses, and certain (but not all) types of HPV have been shown to be the major cause of cervical cancer. For more information on HPV and cervical cancer, see the resources section at the bottom of this page.

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Increased red blood cell (RBC) count
Higher-than-normal numbers of RBCs may indicate congenital heart disease, cor pulmonale (failure of the right side of the heart caused by prolonged high blood pressure in the pulmonary artery and right ventricle), polycythemia, or kidney disease with high erythropoietin production. For more on polycythemia, see below.

Increased hemoglobin (HGB)
Higher-than-normal hemoglobin may indicate congenital heart disease, cor pulmonale (failure of the right side of the heart caused by prolonged high blood pressure in the pulmonary artery and right ventricle), polycythemia, or increased RBC formation associated with excess erythropoietin. For more on polycythemia, see below.

Increased hematocrit (HCT)
High HCT may indicate dehydration, erythrocytosis (excessive red blood cell production), or polycythemia. For more on polycythemia, see below.

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Testosterone usage has been shown to increase "erythropoiesis," or red blood cell production. "Polycythemia" is an abnormally high level of red blood cells. An excess of red blood cells thickens the blood, impeding its passage through small blood vessels and causing a number of potential health problems. There are a few different types of polycythemia: "polycythemia vera," "relative polycythemia," and "secondary polycythemia."

It is important to understand the differences between the three types of this condition, because polycythemia as a result of testosterone usage would probably best be categorized under secondary polycythemia. Of course, if your doctor diagnoses you with polycythemia, it is still important to determine which type of polycythemia you have and proceed with the proper treatment-- one should not automatically assume that an initial elevated RBC or HCT reading is necessarily secondary polycythemia simply based on testosterone use alone. Family history and other factors (listed below) should be considered.

Polycythemia vera (or "primary polycythemia") is a rare myeloproliferative disorder, meaning that the bone marrow cells (which produce red blood cells) proliferate uncontrollably. In polycythemia vera, the RBC count increases without being stimulated by the red blood cell stimulating hormone, erythropoietin (EPO). Risk factors include exposure to radiation, some cancer therapy drugs, and familial history of polycythemia vera.

In the case of relative polycythemia, an individual has an excess of RBCs due to a loss of volume in the plasma (the liquid portion of the blood). This can be due to dehydration, use of diuretics, burns, stress, or high blood pressure.

Secondary polycythemia is defined as an absolute increase in RBCs caused by an increase in the RBC stimulating hormone, erythropoietin (EPO). Potential causes include low blood oxygen caused by heart disease, prolonged carbon monoxide exposure caused by smoking, hereditary disorders producing an abnormal hemoglobin or an overproduction of EPO, or kidney disease.

Complications that can arise from polycythemia include thrombosis (blood clots that can cause stroke or heart attack), hemorrhage, and heart failure.

The objective of treatment is to reduce the thickness of the blood due to the increased red blood cell mass and to prevent hemorrhage and thrombosis.

Phlebotomy is one method used to reduce the high blood viscosity (blood thickness). In phlebotomy, 1 pint of blood is removed weekly until the HCT is less than 45%, then phlebotomy is continued as necessary.

For relative polycythemia and secondary polycythemia, treatment must also address any underlying risk factors, such as smoking.

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Elevated liver levels & potential liver conditions
Testosterone therapy can cause alterations in liver function tests, cholestatic jaundice, hepatocellular neoplasms (rare), and peliosis hepatis. Specifically, the use of orally-administered C-17 alpha alkylated testosterone has been associated with such complications, in addition to being associated with hepatocellular carcinoma and hepatic adenomas. Oral use of C-17 alpha alkylated testosterone is therefore generally discouraged, as injectable, transdermal, buccal, and pellet delivery methods are thought to significantly lower such risks. No matter which testosterone delivery method is being used, it is prudent to screen the user with liver function tests to monitor the overall health of the liver.

Cholestatic jaundice
Jaundice is a yellowing of the skin and other tissues due to excess circulating bilirubin. Mild jaundice is usually detectable when serum bilirubin reaches 2 to 2.5 mg/dl (milligrams per deciliter). Cholestatic jaundice is due to a biliary obstruction (a condition where bile excretion from the liver is blocked, which can occur either in the liver or in the bile ducts).

Hepatocellular neoplasms
Hepatocellular neoplasm is a general term for abnormal new tissue which has grown on the liver (neoplasm means "new growth"). These growths may be benign or cancerous.

Peliosis hepatis
Peliosis hepatis is a condition in which multiple blood-filled cystic spaces develop throughout the liver which may lead to congestion and necrosis.

Hepatic adenomas
Hepatic adenoma (HA) is a rare benign tumor of the liver. Two types of HAs have been identified, including tumors of bile duct origin and tumors of liver cell origin. HAs may rupture and bleed, causing pain. Although they are benign lesions, HAs can undergo malignant transformation to hepatocellular carcinoma (HCC). Although malignant transformation is rare, surgery is advocated in most individuals with presumed HAs.

Hepatocellular Carcinoma
"Hepatocellular carcinoma" (HCC) is a term for a malignant (cancerous) tumor of the liver.

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Suppression of clotting factors
Testosterone has been reported to suppress clotting factors II, V, VII, and X. For those also taking anticoagulent medication such as Warfarin, testosterone may increase the effects of such medication. Caution should be exercised by those taking such medication, or those with bleeding disorders. Consult with your doctor about possible dosage adjustments.

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Elevated lipid profile/High cholesterol
The higher an individual's level of cholesterol, the higher their risk of coronary heart disease. The lower your LDL cholesterol, the lower your risk of heart attack and stroke. It is also important to maintain a high enough level of HDL, or "good" cholesterol. Excessive total cholesterol contributes to atherosclerosis and subsequent heart disease.

Atherosclerosis is a condition in which fat, cholesterol and other substances are deposited along the walls of arteries. This fatty material thickens and hardens, forming "plaques" that diminish the elasticity of the arteries and may eventually block them. Clots can form around plaques, posing an additional danger if they break off and travel to the heart, lungs, or brain.

High triglyceride levels may be associated with a higher risk for heart disease and stroke. People with high triglycerides often have other conditions that increase the likelihood of developing cardiovascular disease, such as diabetes and obesity. High triglyceride levels may also indicate cirrhosis, hypothyroidism, high carbohydrates in diet, poorly controlled diabetes, or pancreatitis.

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High Blood Pressure
High blood pressure, or "hypertension," directly increases the risk of coronary heart disease and stroke, especially along with other risk factors. Testosterone therapy can contribute to raised blood pressure levels. Because of this, and because of other potential risk factors for heart disease such as increased lipid profile or polycythemia, it is wise to monitor blood pressure levels throughout testosterone therapy.

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Edema refers to the abnormal buildup of fluid in the ankles, feet, and legs. It is usually painless. Testosterone is known to cause water and electrolyte retention (i.e., sodium, potassium, calcium, and inorganic phosphates), which can contribute to such swelling. Sometimes increasing daily water intake can reduce or end the problem.

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Acne is a skin disorder (characterized by whiteheads, blackheads, and pimples) that effects the pilosebaceous units (PSUs) of the skin. PSUs consist of a "sebaceous" gland (oil-producing gland) connected to a canal called a "follicle." The follicle contains a fine hair, and the hair grows out through the open end of the canal at the skin's surface. This open end is usually called a "pore." There are numerous PSUs on the face, upper back, and chest (where acne problems often are worst).

The sebaceous glands produce an oily substance called "sebum" that normally empties onto the skin's surface through the pore. Trouble begins when the follicle becomes plugged, thereby preventing the normal draining of sebum. If a follicle becomes blocked for some reason, the mixture of oil cells within allows the bacteria "Propionibacterium acnes" (P. acnes), which is normally present on the skin, to grow inside the plugged follicle.

The P. acnes bacteria inside the plugged follicle causes the body to send white blood cells to that follicle, which in turn causes the area to become inflamed and painful. This leads to a variety of skin lesions.

Acne commonly appears on the face and shoulders, but may also occur on the trunk, arms, legs, and buttocks. Acne can be triggered by hormonal changes; stress; oily facial, body, or hair products; humidity; sweating; and irritation. Testosterone therapy increases activity of the sebaceous glands, and so may increase the presence of acne. Click here or more information on acne and how to treat it.

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Seborrhea, or "seborrheic dermatitis," is a skin condition characterized by loose, greasy or dry, white to yellowish scales on the skin, sometimes with accompanying redness. It may involve the skin of the scalp, eyebrows, eyelids, nose, lips, behind the ears, the external ear, and the skin of the trunk, particularly over the sternum and along skin folds. This side effect of testosterone usage can be temporary or a more long-lasting condition that may flare up due to contributing factors such as stress, fatigue, weather extremes, oily skin, infrequent shampoos or skin cleaning, use of lotions that contain alcohol, skin disorders (such as acne), or obesity.

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Miscellaneous other side effects
Also listed as potential side-effects of testosterone use are: nausea, headache, anxiety, depression, or generalized paresthesia.

Paresthesia refers to an abnormal burning or prickling sensation which is generally felt in the hands, arms, legs, or feet, but may occur in any part of the body. Many describe it as a "pins and needles" feeling.

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Yeast infections and bacterial vaginosis
Hormonal changes can cause changes in the vaginal environment. This can bring about two common types of vaginal infections: yeast infections and bacterial vaginosis. In order to treat these infections properly, it is important to properly diagnose which type of infection you may have by seeing your doctor.

A yeast infection is caused by the overgrowth of a naturally occurring yeast, Candida albicans, in the vagina. If there is a change in the vaginal environment due to hormonal fluctuations, injury, a compromised immune system, increased pH, increased heat and moisture, allergic reactions, elevated sugar levels, or reductions in the populations of bacteria that are normally present, Candida albicans will multiply rapidly and cause the symptoms of a yeast infection. Symptoms include itching and/or a burning sensation around or inside the vagina; a white, clumpy discharge that may look like cottage cheese (discharge can also be thinner and faintly yellow or nearly clear in color); and a smell that is similar to bread or beer.

Treatment of a yeast infection can range from over-the-counter or prescription treatments such as Diflucan or Monistat to natural home remedies such as inserting plain, unpasteurized yogurt into the vagina, drinking unsweetened cranberry juice, or consuming acidophilus. Check with your doctor for advice if yeast infections continue to occur. They may be more common in the beginning of hormonal transition.

The yeast infection should not be confused with bacterial vaginosis (BV), another kind of vaginal infection. BV occurs when certain types of bacteria (such as Gardnerella vaginalis, Bacteroides, Mobiluncus, and Mycoplasma hominis) outnumber the normal Lactobacillus bacteria due to a change in the vaginal environment. The primary symptom of BV is an abnormal gray-white vaginal discharge that often has a fish-like odor. There may also be itching and/or a burning sensation around the vagina.

Bacterial vaginosis is usually treated with antibiotics. Check with your doctor for advice if BV continues to occur. It may be more common in the beginning of hormonal transition.

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Self "chest" exams (for breast-tissue cancer)
Even if you have already had chest surgery, it is wise to continue to give yourself monthly chest exams, as some residual breast tissue may have been left behind after surgery. Keep in mind that breast cancer does occasionally occur in non-trans men.

Below is a description of how to do a self-chest exam. It is a good idea to do them every month or two in order to get used to how the chest tissue feels so that you can better detect changes and irregularities.

  1. Begin by looking at your chest in the mirror with your shoulders straight and your hands on your hips. Look for any unusual change in size, shape, swelling, soreness, or color. Note of your nipples are bulging, have changed position, or an have become inverted (pushed inward instead of sticking out).
  2. Raise your arms above your head and look for the same changes.
  3. Next, gently squeeze each nipple between your finger and thumb and check for any type of discharge.
  4. Lay down down and examine your chest area, using your right hand to feel your left side and then your left hand to feel your right side. Use a firm, smooth touch with the first few fingers of your hand, keeping the fingers flat and together. Follow a pattern to be sure that you cover the area. You can begin at the nipple, moving in larger and larger circles until you reach the outer edge of the chest. Be sure to feel all the tissue: just beneath your skin with a soft touch and down deeper with a firmer touch. Don't forget the area near your armpits! You are looking for changes in tissue density or unusual lumps.
  5. Finally, feel your chest while you are standing or sitting. You may wish to do this step in the shower. Again, you are looking for changes in tissue density or unusual lumps.

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PCOS and ovarian and endometrial cancers
Some physicians recommend hysterectomy (surgical removal of the uterus) and oophorectomy (surgical removal of the ovaries) within the first 5 years of starting testosterone therapy. This is because there is some concern that long-term testosterone treatment may cause the ovaries to develop similar symptoms as those seen in polycystic ovarian syndrome (PCOS). PCOS has been linked to increased risk of endometrial hyperplasia (a condition that occurs when the lining of the uterus (endometrium) grows too much) and thus endometrial cancer, as well as ovarian cancer.

It should be noted that it is difficult to know whether the risk for such cancers is increased by testosterone therapy in trans men. Trans men are a small population to begin with, and many undergo hysterectomy/oophorectomy early on in their hormonal treatment, thus making the study of long-term testosterone effects on the uterus and ovaries difficult. Also, some trans men may have suffered from PCOS before beginning testosterone treatment, making it difficult to know if PCOS-like symptoms may have originated before of after T therapy.

Because the relationship between long-term androgen use and gynecological health is not yet fully understood, and because many trans men often experience embarrassment and/or access issues over obtaining ongoing gynecological care, some may feel it is appropriate to pursue such surgeries as a preventative measure. Always discuss the latest medical research and the pros and cons of these procedures with your doctor. Click here for more information on hysterectomy and oophorectomy.

If a trans man chooses not to have a hysto/oopho procedure, he should continue to have regular Pap smears (to screen for cervical cancer) and should seek out the care of a doctor if he experiences any irregular vaginal bleeding (including spotting), cramping, or pain. It is not uncommon for trans men who are pre-hysterectomy to experience a buildup of endometrial tissue, especially during the first few years of testosterone therapy. Endometrial tissue is normally shed during menstruation, but since this process is usually stopped a few months into testosterone therapy, additional tissue may continue to build up and may eventually begin to shed in the form of spotting. Because irregular bleeding can be a sign of cancer (though this is often not the case), trans men who experience any bleeding/spotting should see a doctor who will perform tests to determine the cause of the spotting. These tests may include an endometrial biopsy and/or an ultrasound. The doctor may advise a short course of progesterone to cause the uterus to shed the excess endometrial tissue-- this is much like inducing a period. While this may be unpleasant, it should be understood as a preventative measure, since the unusual buildup of endometrial tissue has been linked to endometrial cancer.

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Conversion of excess testosterone into estrogen
During the first months of T therapy, many trans men feel impatient waiting for masculinizing changes to happen. Some may consider doubling or tripling their dose, thinking that the more they put in, the faster the changes will come. However, as was mentioned in the "FTM Testosterone Therapy Basics" section, dramatically increasing your T dose might have the effect of slowing your changes. This is because excess testosterone in your body can be converted into estrogen by an enzyme called "aromatase." This conversion is part of the body's natural feedback system-- if there is an abundance of testosterone in the body, it is converted ("aromatized") to estrogen in order to maintain a "normal" hormonal balance. Therefore, taking very large doses of testosterone might not be a great idea. Be patient; if you are not seeing results in a reasonable period of time, and/or your T levels are low, discuss modifying your dosage with your doctor.

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Allergic reactions
Some people may find that they have allergic reactions to the oil in which their injectable testosterone is suspended, or they may have reactions to the skin permeating agents used in T patches or in T creams/gels. If that is the case you may need to try a different delivery method of testosterone, or have a compounding pharmacy prepare your testosterone using a different oil or cream.

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Heart-healthy diet and exercise
Because testosterone use may increase cholesterol levels, blood pressure, and/or red blood cell count, it may be wise to implement a more heart-healthy way of eating and perform regular exercise upon beginning testosterone therapy (if you are not already doing so). Because testosterone use sometimes increases appetite, a healthy lifestyle may also help in keeping off extra body fat.

The American Heart Association ( offers diet and exercise guidelines designed to help keep cholesterol levels, blood pressure, and body weight within healthy ranges.

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Fertility options: egg banking, or "oocyte cryopreservation"
Extended testosterone therapy usually (but not always) results in an interruption in infertility for trans men. Before beginning testosterone therapy, some trans men are choosing to bank their eggs (oocytes) to preserve their fertility and family options. For example, an trans man may choose to bank his eggs so that they may later be fertilized and implanted into a female partner.

There have been instances where trans men have discontinued testosterone therapy for a period of time in order to conceive and give birth. However, because the exact effects of testosterone on fertility are difficult to predict, it is best to discuss and consider fertility issues very carefully with a doctor and plan accordingly.

Egg banking, or "oocyte cryopreservation," is a relatively new medical process that allows eggs to be collected and frozen for future use. The process is not simple. It is quite expensive and involves numerous fertility medication injections (hormones) for three weeks prior to egg collection. It also involves frequent monitoring of bloodwork, as well as vaginal sonograms to gauge egg production. The removal of the eggs themselves is done through minor surgery.

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Especially check out the first two sites below for reliable, FTM-specific health information:

Dr. Nick Gorton's site
Contains the downloadable book Medical Therapy and Health Maintenance for Transgender Men: A Guide For Health Care Providers by R. Nick Gorton MD, Jamie Buth MD, and Dean Spade Esq. This is the most complete care guide available for FTM patients to date-- an excellent resource to show your doctor.

Trans Care Project of Vancouver, British Colombia
Completed in January of 2006, the Trans Care Project created a series of training materials and practice guidelines for clinicians treating trans patients, as well as consumer information about trans health for trans people, FTM and MTF. Their materials are downloadable in PDF, and cover numerous topics of concern to trans people and their care providers.

Prescribing information sheets for:
Testosterone Cypionate (
Androderm Testosterone Transdermal System (
Androgel Topical Testosterone (
Striant's Buccal Testosterone system (
Organon's Testosterone Implant Pellet (

U.S. National Library of Medicine and National Institute's of Health Medline Encyclopedia

Lab Tests Online

Aspirus Medical Library & Patient Education

Medical Dictionary Online

U.S. National Library of Medicine and National Institute's of Health PubMed


International Journal of Transgenderism

American Heart Association

Diseases Database


Hepatitis Encyclopedia

National Women's Health Information Center

National Cancer Institute

American Cancer Society

The Ovarian Cancer National Alliance

National Cervical Cancer Coalition

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