The fetal buds and heart are usually formed about 1 week after the sac is seen, but there are individual variations. In early pregnancy, pregnancy can be confirmed by blood or urine HCG (human chorionic gonadotropin) test, and ultrasound examination can see a round or oval gestational sac in the uterine cavity when menopause is about 35 days old, and most of them can see the fetal buds and primitive cardiac tube pulsation when the ultrasound examination is repeated one week later, but there may be individual variations. Due to the unstable development of the embryo in early pregnancy, it is necessary to pay attention to appropriate rest, avoid strenuous exercise and heavy lifting and other physical labor, prohibit coitus, appropriate increase in diet and nutrition, continue to take folic acid according to the doctor’s instructions on time. When the obstetric examination indicates that the embryo development is on the small side, or symptoms such as abdominal pain and vaginal bleeding occur, you need to go to the hospital in time, and under the guidance of the doctor active treatment.