If the embryo is in a normal state of development, a vaginal ultrasound will not usually cause a miscarriage. If miscarriage occurs, most of them are caused by abnormal embryo development. If miscarriage occurs after doing vaginal ultrasound, it may have occurred or is in the state of miscarriage, and timely treatment is needed according to the miscarriage situation. Miscarriage situation and treatment measures 1. Incomplete miscarriage: It means that after miscarriage, part of the pregnancy is not completely expelled from the uterine cavity, which can cause uterine contraction resulting in heavy bleeding and accompanied by abdominal pain. Under the guidance of professional doctors, scraping or curettage can be chosen to remove the residual tissues in the uterine cavity. 2. Complete abortion: the pregnancy has been completely eliminated from the uterine cavity, the vaginal bleeding is reduced and the abdominal pain disappears. Precautions After abortion, pay attention to local hygiene to prevent infection during bleeding; avoid sexual life for 1-2 months to prevent re-pregnancy in the short term; try to bathe and avoid tub bath to prevent reproductive system infection; strengthen nutrition and avoid strenuous exercise to promote trauma repair.