The fetal germ can be seen around 6-7 weeks of pregnancy. The fetal germ is a stage in the development of the fertilized egg and marks the continued development of the gestational sac. The fetal bud is the basis for the gradual differentiation of the fertilized egg into the various systems and tissues of the fetus, and is a sign that the fetus is alive and continuing to develop. The fetal bud is the earliest visible material that appears during the development of a fetus. In the future, this germ will develop into a fetus. The germ is like a seed that breaks out of the ground and gradually branches out to form a large tree. Of course, if the germ appears late, or if it is delayed, it also means that the gestational sac is underdeveloped or even that the fetus is aborted. Therefore, it is necessary to have an ultrasound of the uterine appendages at 6-7 weeks of pregnancy to determine whether the pregnancy is intrauterine and whether there is a fetal bud or fetal heart. At this time, if there is no fetal bud or if the fetal bud appears late, it is necessary to monitor the progesterone and check the doubling of blood chorionic gonadotropin every other day, if the above indicators are also lower than normal, it may indicate fetal abortion. In conclusion, fetal germination is a sign of continuous fetal development, and it appears at some stage of the development of the gestational sac, usually after 6 weeks of conception.