When you have a frozen cycle, you don’t have to go through ovarian stimulation or egg retrieval. Since you did that in an earlier fresh cycle. You do have to use estrogen and progesterone to thicken the uterine lining and prepare it to receive the embryo transfer. But these medications are much less expensive than the ovarian stimulation medications. They also have fewer potential side effects. Are less demanding of your body. And the ultrasound and bloodwork monitoring that the practice does for you is not part of the FET protocol. Additionally, using frozen embryos can reduce the strain on a woman’s body in the event of repeated cycles. Repeated fresh embryo transfers require repeat egg retrievals and this can increase the risk of negative side affects related to stimulation of the ovaries. With the use of frozen embryos. One retrieval can cover multiple cycles.