Objective: To study the clinical value of frozen-thawed embryo transfer in rescue intracytoplasmic sperm injection cycles. Methods: We performed a retrospective analysis of 306 rescue intracytoplasmic sperm injection( ICSI) cycles,which were carried out after total fertilization failure in conventional in vitro fertilization( IVF) cycles. According to the time for rescue ICSI,these cycles were divided into two groups. Group A included women who performed ICSI 6 ~ 8h after insemination. Group B was 18 ~ 20h ...