Frozen Embryo Replacement Cycle (FERC)
When an IVF cycle produces more than two or three good quality embryos, they can be frozen for future use. These embryos are frozen at an extremely low temperature (-180°C), which prevents any deterioration over the number of storage years.
In a Frozen Embryo Transfer Cycle, the woman is given medications to prepare her womb for planting of these embryos. The advantage of frozen embryo implantation treatment is that no hormone injections are required to stimulate the ovaries.
An ultrasound scan is performed to assess the thickness of the lining of the uterus to determine whether it is ready to receive an embryo. Once the lining is assessed to be ready, the embryos are thawed and transferred to the uterus.