The irregularity of the gestational sac does not have a high viability rate, and it is necessary to go to the hospital for further examination to see if the embryo is underdeveloped and there are signs of pre-miscarriage. Under normal circumstances, the gestational sac is full, regular round or oval, and an irregular gestational sac on ultrasound may be a result of poor development of the embryo within the gestational sac, leading to a decrease in the tension of the gestational sac, a crumpling of the shape of the sac, and an irregular surface pattern. Therefore, an irregular gestational sac may be a sign of poor development of the embryo itself, which may show signs of preterm miscarriage and poor viability of the embryo. Irregular pregnancy sacs should be further examined by going to the hospital for blood tests of HCG and progesterone to determine whether the sac continues to grow. If the hormone level is low or significantly decreased, it means that the embryo has stopped developing and the embryo viability is extremely low. Ultrasound examination of the pregnancy sac irregularity accompanied by vaginal bleeding, abdominal pain and other symptoms, may also be a manifestation of preeclampsia, at this time the embryo viability is also not high, the need for timely treatment of fertility preservation, fertility preservation, if the development is good, you can continue the pregnancy. After the pregnancy check abnormalities, to go to the hospital for more review, there are abnormalities in a timely manner.