Infertility is the failure to achieve pregnancy after a year of unprotected regular intercourse or therapeutic donor insemination in women <35 years old or within 6 months in women >35 years old.

It can be primary if no pregnancy has ever occurred or secondary if pregnancy has occurred irrespective of the outcome.

Ovulation induction is part of the patient's management for polycystic ovarian syndrome which aims to achieve development of a single follicle and subsequent ovulation in a woman with anovulation.