Luteal phase support will be started at the evening of follicle aspiration on all women. Use of intravaginal micronized progesterone 3x200 mg (Progeston soft capsule; Kocak ilac, Turkey), intramuscular progesterone 25 mg/day (Progeston in oil), prednisol tablet for 5 days in 16 mg/ day p.o. dose (Mustafa Nevzat, Turkey) and Estraderm TTS 100 (Novartis Pharma, Basel, Switzerland) 100 microgram/ on alternate days will be recommended until pregnancy result became apparent.