While we are happy to see a positive HCG on the laboratory test, we need to be alert to the occurrence of ectopic pregnancy. Ectopic pregnancy is a false pregnancy. In a normal pregnancy, the sperm crosses the cervix, passes through the uterine cavity and fallopian tube, and meets and unites with the egg from the ovary in the abdomen of the fallopian tube to form a fertilized egg, which then moves to the uterine cavity for further division and development and implantation. If there are abnormalities in the morphology and function of the fallopian tubes, the fertilized egg cannot reach the uterine cavity and stays in the fallopian tube, or if the fertilized egg reaches the uterine cavity but does not “stay” and “wanders” to the opposite fallopian tube again, ectopic pregnancy occurs. Since the fertilized egg does not have the nutritional support and growth space that the uterine cavity provides, it will eventually miscarry or rupture, which can cause serious intra-abdominal bleeding and even life-threatening hemorrhagic shock. In addition, ectopic pregnancy may also have a negative impact on subsequent pregnancies, increasing the likelihood of recurrence of ectopic pregnancy and may even lead to tubal infertility. So is it possible to avoid ectopic pregnancy by doing IVF? Although IVF involves the fertilization of sperm and egg in an in vitro Petri dish to develop into an oogenic embryo or blastocyst, which is then transferred into the uterine cavity of the woman. However, the fertilized egg is alive and the human body harbors many intricate mechanisms. So far, the mechanism of ectopic pregnancy is not clear, so even if IVF places the fertilized egg directly into the uterine cavity, it may still be affected by certain potential factors and wander outside the uterine cavity, resulting in ectopic pregnancy. Therefore, IVF cannot prevent the occurrence of ectopic pregnancy, but it can solve the tubal factor infertility secondary to ectopic pregnancy.