IVF II is short for Intracytoplasmic Single Sperm Microinjection, which involves injecting a single sperm into an egg in vitro after obtaining the woman’s egg to assist fertilization.
IVF II is the intracytoplasmic single sperm microinjection technique, which is mainly applicable to the male partner’s severe oligo- and hypospermia, or the sperm cannot fertilize the egg during the assisted reproduction process of IVF I. The male partner has no sufficient number of sperm to be able to fertilize the egg.
Since the male partner does not have a sufficient number of viable and normal sperm to fertilize the egg naturally or in vitro, he can choose the second generation IVF technique, in which the physician selects a viable and well-morphosed single sperm under the microscope, and injects it directly into the oocyte through a syringe to fertilize the egg, thus obtaining a transferable embryo.