The effect of Polycystic Ovary Syndrome (PCOS) with or without obesity has received a few attentions. There is a lack of evidence to whether the BMI affects the endometrial blood flow, which is necessary for implantation.

Inclusion Criteria:

• Women with PCOS are diagnosed according to Rotterdam criteria, (Rotterdam and ASRM-Sponsored, 2004)by the presence of two out of the following three: oligomenorrhea (absence of menses for 35-182 days) or amenorrhea (absence of menses for >182 days), signs or symptoms of hyperandrogenism (acne, hirsutism), US showing polycystic ovaries.
• Fertile women had regular menstruation, with at least one previous spontaneous pregnancy.

Exclusion Criteria:

• Women known to have hepatic or renal dysfunction, Diabetes mellitus, hypertension, or cardiovascular disease.
• If they have used induction of ovulation drugs for the last three months.
• If they have used hormonal contraception in the last three months.

100 women were recruited from gynecology clinic of Women Health Hospital