Male hypogonadism is a condition where the body doesn't produce enough testosterone, an essential male sex hormone. This can happen at any age, but is more common in men who are middle-aged or older. Studies show that 35% of men over 45 have primary hypogonadism.
Primary hypogonadism is a health problem that happens when the ovaries or the testes do not make enough sex hormones. These hormones are essential for puberty, fertility, bone strength, mood, and overall well-being. When the gonads are not working correctly, the brain keeps sending out signals to try to make them work, but the hormone levels stay low. Doctors can see this in blood tests, where testosterone or oestrogen is low but the signals from the brain (LH and FSH) are high.
Understanding primary hypogonadism matters because it can affect both men and women at different stages of life. It may lead to problems with puberty, fertility, mood, energy, or bone health. In this blog, we will look closely at the main symptoms, the most common causes, and the treatments that can help people manage this condition more effectively.
Primary hypogonadism is a condition where the problem starts in the gonads. The gonads are the testes in boys and men, and the ovaries in girls and women. Their job is to make sex hormones such as testosterone in males and oestrogen in females. These hormones are crucial for puberty, fertility, strong bones, healthy muscles, and overall well-being.
When the gonads do not work as they should, the body cannot make enough of these hormones. The brain notices this and tries to help by sending out more of its controlling hormones. These are called luteinising hormone (LH) and follicle-stimulating hormone (FSH). However, the gonads cannot respond appropriately, so sex hormone levels stay low. This is why doctors sometimes call the condition hypergonadotropic hypogonadism, which means high LH and FSH but low sex hormones.
It is also essential to understand the difference between primary and secondary hypogonadism. In secondary hypogonadism, the gonads are healthy, but the brain does not send enough signals. In primary hypogonadism, the brain is working well, but the gonads themselves are not able to make the hormones.
The symptoms of primary hypogonadism can look different in males and females. They can also vary depending on the age at which the condition begins.
In boys before or during puberty:
In adult men:
In girls before or during puberty:
In adult women:
Primary hypogonadism happens when the testicles (the male sex glands) cannot make enough testosterone. There are many reasons why this can happen:
Some men are born with changes in their genes that cause hypogonadism.
The immune system normally protects us by fighting off germs. But sometimes it attacks healthy cells by mistake.
Sometimes, the testes don’t move down into the scrotum (their proper place) before or just after birth. If they stay inside the body, they may not work correctly and can produce less testosterone.
Because the testicles hang outside the body, they are more likely to get hurt. A bad injury can damage them and reduce testosterone levels.
Chemotherapy and radiotherapy can temporarily stop the testes from making testosterone and sperm. Many men recover after treatment, but doctors often recommend freezing sperm beforehand.
Testosterone levels naturally drop as men get older. Around 1 in 3 men over 75 have low testosterone.
Doctors use a mix of medical history, physical checks, and blood tests to find out if someone has primary hypogonadism.
The first step is usually a talk about symptoms. A doctor may ask about puberty, energy levels, mood, sex drive, or periods. They may also ask about family history and any past illnesses or treatments, such as chemotherapy or infections like mumps.
A physical check can give more clues. In males, this may include looking at the size of the testes, body hair, and muscle strength. In females, it may consist of looking at breast development and the menstrual cycle.
Blood tests are critical. These tests usually show low levels of sex hormones such as testosterone in males or oestrogen in females. At the same time, they show high levels of the brain hormones called luteinising hormone (LH) and follicle-stimulating hormone (FSH). This is a clear sign that the gonads are not working even though the brain is sending a strong signal.
Sometimes extra tests are needed. For example, genetic testing may be used if doctors think the cause is inherited. Imaging tests, such as an ultrasound or MRI scan, can also be used to look at the ovaries or testes if needed.
Primary hypogonadism can affect many parts of the body and can also affect mental health. The problems may be different for each person, but some are very common.
One of the most significant effects is on fertility. In men, the testes may not make enough sperm, which makes it hard to father a child. In women, the ovaries may not release eggs regularly, which makes it hard to get pregnant.
The condition can also weaken the bones. Low hormone levels can lead to osteoporosis, characterised by thinning bones that break more easily. This can happen in both men and women.
There can also be changes in the body. Men may lose muscle and gain more body fat. Women may have hot flushes and other symptoms linked to low oestrogen. Both men and women may feel exhausted, have less energy, or lose interest in sex.
Mental health can also be affected. Some people may feel low, anxious, or have problems with confidence. These feelings are linked to both hormone changes and the stress of dealing with the condition.
Testosterone is the primary male sex hormone. It is essential for the body, the brain, and sexual development.
During puberty, testosterone causes significant changes, such as:
Primary hypogonadism cannot always be cured, but some treatments can help with symptoms and improve quality of life. The proper treatment depends on the person’s age, sex, and whether they want to have children in the future.
The most common treatment is hormone replacement therapy. In men, this is usually testosterone, and in women, it is usually oestrogen, sometimes with progesterone. This helps replace the hormones that the gonads cannot make. It can improve energy, sex drive, mood, and bone health.
Other treatments can help with fertility, bone health, and general well-being. The table below shows some of the main options.
Treatment |
How it Helps |
Things to Know |
Hormone replacement therapy (HRT or TRT) |
Restores hormone levels. Improves energy, mood, sex drive, muscle, and bone health. |
Needs regular blood tests and check-ups. May reduce natural fertility. |
Gonadotropin therapy (for men) |
The testes use hormones to help make sperm. |
Works best if the testes are still partly functional. Treatment can take time. |
Clomifene (mainly for men) |
Helps the body make more of its testosterone without blocking sperm production. |
Sometimes used if fertility is essential. It is not always the first choice. |
Fertility treatments |
Options like IVF or ICSI may help men and women have children when natural conception is not possible. |
Usually needs specialist care. |
Lifestyle support |
A healthy diet, regular exercise, enough sleep, and stress control can support hormone treatment. |
It cannot replace hormones, but it helps overall health. |
Doctors usually recommend regular check-ups to ensure treatment is safe and effective. For example, men on testosterone need blood tests to check red blood cell levels, and women on oestrogen may need breast and pelvic checks.
Testosterone can be given in different ways. A doctor will decide what is best for each person.
Like all treatments, testosterone replacement therapy (TRT) can have side effects, so it is not suitable for everyone. Before starting, doctors check your medical history and conduct tests to ensure it is safe. TRT can sometimes make prostate cancer grow faster, make sleep apnoea (breathing problems during sleep) worse, or increase the risk of heart failure.
Primary hypogonadism is a condition where the ovaries or testes do not make enough sex hormones such as testosterone or oestrogen. This can lead to problems with puberty, fertility, bone health, mood, and overall energy levels.
In primary hypogonadism, the problem is in the gonads themselves, so they cannot respond to the brain’s signals. In secondary hypogonadism, the gonads are healthy, but the brain does not send enough hormones to stimulate them.
The symptoms of primary hypogonadism in males can include low sex drive, erectile problems, reduced muscle strength, more body fat, breast tissue growth, tiredness, and weak bones. In teenage boys, it can cause delayed puberty and lack of normal development.
The symptoms of primary hypogonadism in females can include missed periods, problems with fertility, hot flushes, loss of interest in sex, thinning of bones, and low mood. In young girls it can cause poor breast development and late or absent puberty.
Primary hypogonadism can be caused by genetic conditions such as Klinefelter syndrome in men or Turner syndrome in women. Infections like mumps, injuries, cancer treatments, autoimmune disease, or long-term illnesses such as kidney or liver disease can also cause it.
Doctors diagnose primary hypogonadism with a mix of medical history, physical checks, and blood tests. The key sign is low testosterone or oestrogen with high levels of LH and FSH, showing that the gonads are not responding to the brain’s signals.
Yes, primary hypogonadism can cause infertility in both men and women. Men may not produce enough sperm, and women may not release eggs regularly. Treatments such as gonadotropin therapy or assisted reproduction may help some people.
The main treatment for primary hypogonadism is hormone replacement therapy, which replaces missing testosterone in men and oestrogen in women. Other options include gonadotropin therapy, clomifene for men, fertility treatments, and lifestyle support.
Primary hypogonadism impacts the sexual and physical health of men worldwide. If you have this condition, getting timely treatment to improve your quality of life is essential.
TRT is the most effective treatment to reduce the signs and symptoms of hypogonadism. Contact a hormone specialist to get started and improve your overall well-being. If you're considering testosterone replacement therapy, we can help. Our specialists will guide you through the process and provide the support you need for effective treatment.