in vitro fertilization

1. N a technique enabling some women who are unable to conceive to bear children. Egg cells removed from a woman's ovary are fertilized by sperm in vitro; some of the resulting fertilized egg cells are incubated until the blastocyst stage, which are then implanted into her uterus 試管內(nèi)授精; 體外授精 ( abbr: IVF)