Pregnancy after Transplantation of Cryopreserved Ovarian Tissue in a Patient with Ovarian Failure after Chemotherapy

To the Editor: Premenopausal women who undergo high-dose chemotherapy have a very high risk of ovarian failure.1 Cryopreservation of ovarian tissue with subsequent autotransplantation has effectively preserved fertility in an animal model,2 but its efficacy in humans has been uncertain. Eggs that were aspirated from cryopreserved ovarian tissue transplanted in heterotopic sites did not result in a pregnancy.3 A live birth was reported after transplantation of cryopreserved ovarian tissue in a woman who had undergone treatment for Hodgkin's disease; however, since the woman had ovulated before transplantation, it is uncertain whether the egg came from the native ovary or the . . .