The egg donation process consists of two phases. In the first phase, ovarian hyperstimulation, donors receive a series of hormonal drugs which cause the ovaries to produce multiple mature eggs during one menstrual cycle. During the second phase, egg retrieval, mature eggs are removed from the donor through a surgical procedure called transvaginal ultrasound aspiration. Egg donors should expect to spend around 60 hours for screening, testing, and medical appointments throughout the course of the procedure.