A 7mm bud at 7 weeks gestation does not necessarily mean that there will be a fetal heart. Generally in women with regular periods, a pregnancy sac can be seen in the uterus on ultrasound after 5 weeks of menopause. After 6 weeks of menopause, fetal buds and fetal heartbeat can be seen. However, this time is not true for all pregnant women, and some women with longer menstrual cycles or late ovulation will diagnose pregnancy later. That is why 7 weeks of pregnancy with 7mm of buds does not necessarily mean that there will be a fetal heart. In this case, it is necessary to review the ultrasound again after a week to check whether the gestational sac and embryo bud have grown, and at this time to see if there is a fetal heart. At the same time, you can refer to the changes in blood hCG, together to determine whether there is a possibility of embryonic arrest. If there is no growth of the embryo buds and still no fetal heartbeat, consider fetal arrest and the pregnancy should be terminated promptly. If there is a fetal heart after rechecking, it suggests that the embryo is developing normally, and it is necessary to have obstetric checkups on time, and consult the doctor for treatment if there is any abnormality in time.