In general, the fetal heart and fetal bud can be seen by ultrasound at about 48 days of pregnancy, but due to individual differences, the development of each fetus is not exactly the same, and there may be cases that the fetal heart and fetal bud cannot be seen at 48 days, so we need to pay close attention to them and review them in time. If the pregnant woman usually has regular menstrual cycle, maintaining around 28-30 days, usually the fetal bud can be seen by ultrasound around 42 days after menopause, and the fetal heart can be seen around 48 days after menopause. If the fetal heart and fetal bud are not seen at 48 days of pregnancy, this may be caused by late embryo implantation. As long as there is no abdominal pain or vaginal bleeding, you can wait for about 1-2 weeks before going to the hospital for ultrasound examination. If no fetal heart or germ is seen at 60 days, it is necessary to consider whether the embryo is abnormal due to chromosomal abnormality or external stimulation, resulting in embryonic abortion, and then the pregnancy should be terminated under the guidance of the doctor. Therefore, during pregnancy, pregnant women should have regular maternity checkups, avoid exposure to toxic and harmful substances, and take folic acid tablets under the guidance of a doctor to reduce the incidence of embryonic abnormalities and ensure normal fetal growth and development. In addition, early pregnancy should ensure sufficient rest and sleep time, maintain a good mental state, reduce the stimulation of external factors to the fetus, so that the fetus healthy development.