Male infertility can also be classified as: pre-testicular causes would include hypogonadotropic hypogonadism, erectile dysfunction, or coital disorders such as retrograde ejaculation, anejaculation, genetic factors, chromosomal abnormalities.

The most common issues that lead to infertility in men are problems that affect how the testicles work. Other problems are hormone imbalances or blockages or absence of some of the ducts in the male reproductive organs. Lifestyle factors and age-related factors also play a role in male infertility.

Causes of male infertility

These may include abnormal sperm production or function due to undescended testicles, genetic defects, health problems such as diabetes, or infections such as chlamydia, gonorrhea, mumps or HIV. Enlarged veins in the testes (varicocele) also can affect the quality of sperm.