Birth after transfer of cryopreserved embryos.

A normal baby girl was delivered after the successful transfer of two thawed embryos which had been frozen for eight weeks. Embryo cryopreservation may improve the chances of conception by women who are undergoing in-vitro fertilization (IVF), reduce the risks of multiple pregnancies in association with IVF, and offer the chance of conception to women with serious gynaecological disease which threatens ovarian function.