The success rate of IVF is about 50% in China and up to 60%-70% in well-known centers. The factors that affect the success rate are as follows: 1) if the technology is mature, the laboratory needs to be provided with eggs of good quality; 2) the fertilization process of sperm and eggs takes about 5 days and needs to be performed in an in vitro environment, so the environment of the culture room and the conditions of the incubator have a greater impact on IVF technology; 3) the operational proficiency of the technicians and the responsibility of the staff all have a greater impact on the technology.