Chorionic villus bulge refers to an abnormal state of the gestational sac detected on color Doppler ultrasonography in the early stages of a pregnant woman’s pregnancy, who may experience symptoms such as a small amount of vaginal bleeding. Chorionic villus bulge is a localized bulge of the chorionic villus on the fundal surface of the meconium towards the gestational sac in early pregnancy, which is a special sign in ultrasonography, and is currently believed to be caused by small amount of chorionic villus bleeding or chorionic villus edema. Most of the pregnant women will not have very obvious discomfort, a few pregnant women will have a small amount of vaginal bleeding, abdominal pain and other symptoms, and a very small number of pregnant women will have a preterm miscarriage. If the phenomenon of chorionic villus bulge is detected during the labor examination, don’t be too nervous, actively cooperate with the doctor to closely monitor the condition of the fetus and the pregnant woman, and don’t blindly abort or blindly carry out fertility preservation treatment. If the embryo is well developed, most pregnant women will gradually get better, pay attention to regular checkups in the hospital, do not blindly use drugs.