A couple is classified as 'infertile' or 'sub-fertile' if pregnancy has not occurred after one year of regular unprotected sexual life.

On average one out of six couple is infertile in which 40% due to female factor, 40% is male factor another 20% is both male and female factor.

The common cause of female factor is either anovulation or tubal damage and male factor is mainly due to sperm defect of its quantity and quality.