It is normal to have a gestational sac, fetal heartbeat, and fetal buds but no yolk sac on ultrasound at 7 weeks of pregnancy, as the yolk sac is a descriptive structure in early pregnancy. At around 7 weeks of pregnancy, it is normal to find a gestational sac with fetal heartbeat and fetal buds by ultrasound and there is no need to worry too much about it. The yolk sac is a descriptive structure of the embryo when there is no fetal heartbeat or buds, and after the appearance of fetal heartbeat or buds, the yolk sac will gradually disappear, and the yolk sac will not be expressed clinically. For those who have found the yolk sac with fetal heartbeat and buds, and other indicators are normal, without accompanying uncomfortable symptoms, it is sufficient to pay attention to rest in the early pregnancy period, and consult the doctor for obstetric checkups on a regular basis. If the pregnancy is accompanied by abdominal pain, vaginal bleeding and other abnormalities, then timely medical examination should be carried out in order to take effective measures to prevent the occurrence of accidents. In the early stages of pregnancy, pregnant women should adjust their mindset to avoid emotional fluctuations, and pay attention to the reasonableness of the diet to ensure a balanced intake of nutrients. Follow the doctor’s instructions and take obstetrical examination on time in order to monitor the growth and development of the fetus.