If there are no contraindications, the donor begins the stage of hormonal stimulation – due to the administration of appropriate drugs, the donor’s egg cells are stimulated to work more intensively, and more than one egg cell matures in a given cycle. During the so-called stimulation, ultrasound and laboratory tests are performed so that the eggs can be collected at the right moment in the procedure room. The procedure involves puncturing the ovary and collecting fluid from ovarian follicles (Graafian follicles). The follicular fluid contains the egg cells that will be transferred to the recipient couple. The procedure takes place in a properly equipped ward, under ultrasound guidance, under general anaesthesia and with the attendance of an anaesthesiologist. Once the procedure is completed, the woman remains under observation for 1.5 to 2 hours.