After randomized allocation to the two groups
All patients were monitored in terms of follicle diameters, EMT, and endometrial type every 2 days from the 8th day to the 10th day of the menstrual cycle until ovulation day during three menstrual cycles. Serum progesterone level on 7–8 days after ovulation were also measured. Cumulative pregnancy rate within 3 months was followed up.