This is a procedure where hormones (FSH) are used to stimulate growth of ovarian follicles. Monitoring of follicular growth is done by ultrasound and, in general, are held three to four tests. When the follicles reach the ideal size, the ovulation is then induced to the egg and sperm can be released fertilizes it. This requires that the couple has sex in the most suitable time, which will be recommended by your doctor. Success rates: Varies around 15% per cycle of treatment.