To determine correlation between progesterone level on day hCG with encometrial receptivity on day embryo transfer (ET). This is cross sectional diagnostic study.which is done to 55 patients undergoing IVF in Yasmin Clinic Dr. CiptoMangunkusumo Hospital between January –November 2008. Progester-one level on day hCG was measured Endometrial receptivity was calculated as uterine artery pulsatil…