In vitro fertilization-embryo transfer is the process of removing eggs from a woman’s ovaries, fertilizing them with sperm in a test tube and culturing them for 3-5 days, and then transferring the developing embryos to the woman’s uterine cavity so that they can normally implant and develop into a fetus. At this stage, there is clinical data proving that the success rate of IVF is about 30-40%, and the success rate has nothing to do with the first few times of IVF, but the success is mainly related to the following factors: 1. The success rate of IVF for women under the age of 30 is 50% or higher, while the success rate for women over the age of 40 decreases significantly. In addition, the presence of diseases such as endometriosis, hydrosalpinx, adenomyosis, endometrial abnormalities such as uterine adhesions, etc. can cause a decrease in the success rate. 2. Psychological factors: Most women who undergo IVF have their own or their partners’ diseases that cause infertility, and they may be under some psychological pressure; in addition, compared to natural pregnancy, IVF patients need to go through ovulation injections, egg retrieval by puncture, embryo transfer, etc., which may cause discomfort. The process of IVF, compared with natural pregnancy, requires patients to go through frequent ovulation injections, puncture and egg retrieval, embryo transfer and other processes, which may cause uncomfortable symptoms and lead to poor mood and stress, while abnormal psychological and mental state may lead to unsuccessful or unstable embryo implantation, resulting in a lower probability of success; 3. Embryo quality: factors such as the activity of sperm and eggs can affect the quality of embryos, and if the embryo quality is not high, the success rate of IVF is low.