Eggplant shape and oval are common shapes of gestational sacs in early pregnancy ultrasound, mainly because of the difference in morphology. The gestational sac is the initial form of pregnancy, the embryonic embryo embryo wrapped by the amniotic membrane and vascular network, at this time the fetus has not yet formed. The gestational sac is usually round or oval, which is the normal shape. If the sac looks eggplant-shaped, i.e. pointed at both ends, it may be thin or uneven, which can be an irregular shape, and that may indicate a possible problem with the development of the embryo. The gestational sac is usually visible in the thirtieth day of pregnancy, and its size is related to a number of factors, including the length of the pregnancy, nutrition, location of the bed, and the size of the uterine cavity. In life, many people will judge the gender of the fetus based on the shape of the gestational sac, which is unreliable without any scientific basis. It is recommended to go to the hospital regularly for relevant checkups to monitor the condition of the gestational sac in time.