The most common clinical cause of miscarriage in the first week of pregnancy is due to a genetic defect in the embryo itself. If there is vaginal bleeding or pain in the lower abdomen in this case, the clinical treatment given to stabilize the pregnancy often fails. In addition, this condition is also seen in uterine developmental abnormalities, such as longitudinal uterus, in which the uterus fails to grow with the size of the gestating fetus, and miscarriage occurs, and it is recommended to have the longitudinal uterus removed after the body recovers. In addition, severe internal diseases or sudden noise or cold stimulation may lead to miscarriage. Clinical examination should be done in conjunction with the medical history in order to understand the specific causes of miscarriage.