A Japanese nationwide survey on the cryopreservation of embryos, oocytes and ovarian tissue for cancer patients

The survival rates of cancer patients have greatly improved owing to the advances in oncology. The preservation of fertility in cancer patients is an important task. To determine the reality of cryopreservation of embryos, oocytes and ovarian tissue in cancer patients, large-scale survey analysis was performed in Japan.We sent 613 Japan Society of Obstetrics and Gynecology-certified assisted reproductive technology institutions a questionnaire...