Irregularity of the gestational sac can be detected during ultrasound examination, and attention needs to be paid to be alert to abnormal problems such as miscarriage and fetal development defects. If the examination reveals that the gestational sac appears in the lower part of the uterus, and the sac is irregularly shaped and blurred, and the pregnant woman has abdominal pain accompanied by vaginal bleeding, it is important to be aware of the possibility of miscarriage. The irregular shape of the surface of the gestational sac, which may be caused by bleeding, is usually diagnosed as embryonic abortion or preterm miscarriage. If the gestational sac is irregular and ruptured, you need to be alert to the problem of fetal birth defects and possible miscarriage at a later stage and need to be prepared. In addition, if there is a fibroid in the mother’s uterus, the shape will change when the gestational sac is implanted, and in this case you need to pay attention to whether the fibroid will affect the fetus. However, the irregular shape of the gestational sac does not necessarily mean that there is a problem, it can also be caused by irregularities in the shape of the uterine cavity, so there is no need to be too anxious as soon as the irregularity of the gestational sac is detected. In addition, pregnant women should pay attention to folic acid and vitamin supplementation, take good care of themselves and review the ultrasound regularly. If you find that the gestational sac is growing gradually and the HCG is increasing normally, it means that the gestational sac is in a good condition.