Infertility is a disease of the reproductive system defined by the failure to achieve a clinical pregnancy after 12 months or more of regular unprotected sexual intercourse. There are two kinds of infertility primary and secondary.
Primary infertility means that the couple has never conceived. Secondary infertility means that the couple has experienced a pregnancy before and failed to conceive later. Globally, most infertile couples suffer from primary infertility.
Infertility can be caused by both men and women factors. About a third of infertility problems are due to female infertility and another third are due to male infertility. In remaining cases infertility may be due to problems in both partners or the cause is unclear.
