The patients with PCO and hyper insulinemia will be subdivided into two groups, one group will continue metformin 500 mg three times per day from the start of induction of ovulation till the end of pregnancy, the other group will stop the drug once pregnancy test become positive. Pregnancy follow up including the early and second trimester pregnancy loss, Secondary outcomes like gestational diabetes, pregnancy-induced hypertension and intrauterine growth restriction were also analyzed at the end of the study.