Causes of infertility in Men: The most common male infertility causes include azoospermia (no sperm cells are produced) and oligospermia (few sperm cells are produced). Sometimes, sperm cells are malformed or they die before they can reach the egg. These reasons for infertility could be physical, congenital, diseases, drugs, immunological or even psychological.

Causes of Infertility In Women: The most common female infertility factor is an ovulation disorder. Other causes of female infertility include blocked fallopian tubes, which can occur when a woman has pelvic inflamatory disease. Congenital anomolies involving the structure of the uterus and uterine fibroids are associated with repeated miscarriage. Aging is also an important factor in female infertility. The ability for
ovaries to produce eggs declines with age, especially after age 35.