The ultrasound shows that the size of the gestational sac is only 8*7mm, which can’t accurately determine whether it is normal or not, but should be combined with the fetal heartbeat and other data to determine. Usually, if a woman’s menstrual cycle is regular for about 30 days, the diameter of the gestational sac is generally between 25-30mm, and at this stage, you can see obvious embryonic buds, amniotic level segments, and fetal heartbeat. However, the size of the gestational sac cannot be the only criterion to judge whether the development of the fetus is normal or not. Some women have a relatively long menstrual cycle, delayed ovulation, relatively late conception, and delayed implantation, which results in the size of the gestational sac being smaller than the data, but the fetus is also in the normal development stage. Therefore, it is recommended that women pay more attention to their own actual situation at this stage, combined with the germ, amniotic level segment, fetal heartbeat and other data together to judge, found that the problem of timely intervention, under the guidance of the doctor to clarify the cause of the disease, and actively intervene in the treatment. Pregnant women should pay attention to prenatal checkups during pregnancy, and actively listen to the advice of professional doctors to do a good job of comprehensive care and health care, which can effectively ensure the safety of delivery.