In general, women who usually have regular menstrual cycles will show germs around 40-50 days after pregnancy. If the germs do not appear even after 60 days of menopause, this indicates the possibility of embryonic failure or an empty gestational sac. The first two weeks after the sperm and egg unite to form a fertilized egg is called the gestational egg, which divides to form the gestational sac and then gradually forms the embryo, which in most cases will appear around 7 weeks of pregnancy. For some women with irregular menstrual cycles, the germs may not be observed at 40-50 days after menopause due to late conception. In this case, you can continue to observe the embryo for 7-10 days, and if the germs are still not seen, then you should consider the case of embryonic arrest or empty gestational sac. It is recommended that women go to the hospital after 40-50 days of pregnancy for gynecological ultrasound examination to observe the development of the embryo, and need to check the values of blood HCG and progesterone at the same time to comprehensively assess the situation of the embryo.