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Infertility: Problems With the Man's Reproductive System
The most common cause of male infertility is low sperm count. Absence of sperm in the semen is less common, affecting 1 out of 100 men and affecting 10 to 15 out of 100 infertile men.1
Causes of sperm count problems include:
- Hormonal problems in the testicles or pituitary gland. The pituitary gland releases hormones that stimulate the testicles to produce testosterone.
- Testicular injury or failure, either present at birth (congenital) or associated with radiation or toxic chemical exposure.
- Cancer treatment with certain kinds of chemotherapy or radiation.
- Antibodies that attack sperm and that also may be present in semen. Sperm antibodies sometimes develop when a man's sperm has been exposed to his immune system (outside of the testicles). This may happen after a vasectomy, an infection, or an injury to the testicles.2
- Drug use (some prescription medicines, and marijuana and tobacco use).
- Structural problems. These include:
- Chromosomal problems (such as Klinefelter syndrome).
- Genetic problems.
See a picture of the male reproductive system.
|Primary Medical Reviewer||Sarah Marshall, MD - Family Medicine|
|Specialist Medical Reviewer||Femi Olatunbosun, MB, FRCSC - Obstetrics and Gynecology|
|Last Revised||December 7, 2011|
|By:||Healthwise Staff||Last Revised: December 7, 2011|
|Medical Review:||Sarah Marshall, MD - Family Medicine|
Femi Olatunbosun, MB, FRCSC - Obstetrics and Gynecology
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