Infertility

"Infertility refers to an inability to conceive after having regular unprotected sex. Infertility can also refer to the biological inability of an individual to contribute to conception, or to a female who cannot carry a pregnancy to full term. In many countries infertility refers to a couple that has failed to conceive after 12 months of regular sexual intercourse without the use of contraception. Studies indicate that slightly over half of all cases of infertility are a result of female conditions, while the rest are caused by either sperm disorders or unidentified factors.
1. About 20% of cases of infertility are due to a problem in the man.
2. About 40% to 50% of cases of infertility are due to a problem in the woman.
3. About 30% to 40% of cases of infertility are due to problems in both the man and the woman."

Sterility

Sterility is an inability of a man to fertilize an egg, or reproduce. Sterility is caused by poor function or failure of the testes, the male sex organs that produce sperm. Damage to the testes from radiation or chemotherapy is a common cause of sterility among cancer patients. Chemotherapy involves the use of drugs that destroy cells that grow rapidly, a characteristic of cancer cells.