Triptorelin 0.1mg (Decapeptyl® Ferring, Germany) was used for pituitary down-regulation. It was given 7 days after the expected time of ovulation in women with regular cycles. Women with irregular cycles were given combined oral contraceptive pills and triptorelin was started on day 21 after starting the pills. On the second day of menstruation serum FSH, LH, Prolactin and Oestradiol were assessed and the antral follicular count (AFC) was assessed using a vaginal ultrasound scan. AFC will be defined as the number of follicles measuring 3-10mm.