Live birth and normal 1-year follow-up of a baby born after transfer of cryopreserved embryos from rescue intracytoplasmic sperm injection of 1-day-old oocytes.

OBJECTIVE: To report the birth and normal pediatric follow-up of the first baby born after transfer of embryos derived from cryopreserved rescue intracytoplasmic sperm injection (ICSI). DESIGN: Case report. SETTING: Academic fertility unit. PATIENT(S): A 36-year-old woman with unexplained infertility. INTERVENTION(S): Reinsemination by ICSI ("rescue" ICSI) followed by cryopreservation at the pronuclear stage was performed after partial fertilization failure. MAIN OUTCOME MEASURE(S): Pregnancy, birth, and 1-year follow-up of the baby born after the transfer of the cryopreserved rescue ICSI embryos. RESULT(S) AND CONCLUSION(S): Zygotes obtained after rescue ICSI were able to tolerate the process of cryopreservation and resulted in a viable pregnancy and delivery.