In case of bleeding from the toilet during pregnancy, if it is vaginal bleeding, this is first considered as a possibility of preterm miscarriage or preterm labor. Absolute bed rest is required and the amount of bleeding should be monitored. If there is an increase in bleeding during this period and if it is accompanied by stomach pain, you should go to the hospital promptly for a check-up. In early pregnancy, progesterone should be checked and if it is low, progesterone should be administered promptly to preserve the pregnancy. If you are in the middle and late stages of pregnancy, you need to take symptomatic treatment with medication according to the month, and the medication used will be different. In case of preterm miscarriage at 20 weeks of pregnancy, ritodrine can be used to preserve the pregnancy. In case of miscarriage after 24 weeks, magnesium sulfate or nifedipine can be used. This medication has a fetus-preserving effect by inhibiting uterine contractions and relieving stomach pain caused by smooth muscle spasms.