It is a procedure that begins with the induction of ovulation in the same way that made for the planned sexual intercourse, to stimulate growth of ovarian follicles, with the same kind of monitoring by ultrasound. When the follicles reach the desired size, the semen is collected, processed in the laboratory and more capable of reaching the egg and fertilize are selected. These are then placed in a catheter and then placed in the uterus, to come more quickly to tubes, where fertilization occurs. The fertilization of egg by sperm is thus within the body of the woman. Success rates: Varies around 15 to 20%