Note: Values are expressed as mean ± SD or percentage. Fertilization rate: two-pronuclear zygotes (2PNs)/total MII oocytes in ICSI cycle or fertilized oocytes/total oocytes in IVF cycle. Cleavage rate
BackgroundInfertility is a common health problem affecting couples of childbearing age. The proposal of in vitro fertilization-embryo transfer (IVF-ET) solves the problem of infertility to a certain e