5 stages of IVF procedure: Ovarian stimulation which lasts 12-14 days and the stimulation protocol is personalized upon each couple’s medical history. Oocyte collection that is performed intravaginally with mild sedation and ultrasound monitoring. Fertilization. This represents the main laboratory stage of patient’s attempt. Embryo evaluation. On the first day after oocyte collection, fertilization checking occurs. Embryo transfer. If everything goes well, the number of embryos to be transferred will be decided by the doctors, taking account the age of the woman, embryo quality and her medical history.