Whether a blood clot is serious or not in pregnancy needs to be determined according to the time of pregnancy, the intrauterine condition of the fetus and the condition of the placenta. 1. Early pregnancy: a lump of blood clots falling out of the toilet may be different types of miscarriage, such as preeclampsia, incomplete miscarriage, complete miscarriage, etc. It is necessary to go to the hospital in time to do gynecological examination and ultrasound to understand the condition of the fetus in the uterus and whether it is viable or not. According to the examination results and clinical manifestations such as the amount of vaginal bleeding, the doctor will evaluate the patient and give him/her treatments such as fertility preservation and uterine evacuation according to his/her different conditions. 2. Middle or late pregnancy: a lump of blood clots falling out when going to the toilet, also need to go to the hospital in a timely manner according to whether the patient continues to bleed vaginally, ultrasound examination, to understand the condition of the fetus in the uterus and the location of the placenta. According to the gestational week, fetal status and placental position, comprehensive analysis and evaluation, such as small fetus, normal fetal heart, vaginal bleeding is not much, due to the low position of the placenta, considering the placenta factor caused by bleeding, to take positive expectant therapy, such as rest, given to the hemostatic drugs, inhibit uterine contraction of drugs and other treatments, and closely observe changes in the condition, and strive to prolong the gestational week. 3. Approaching full-term pregnancy: If a blood clot falls out of the toilet, it may be near labor, and you need to go to the obstetrics department of the hospital to prepare for delivery. Regardless of the stage of pregnancy, such as falling out of a pile of blood clots, you need to go to the hospital in a timely manner, by a professional doctor to give the relevant examination, to clarify the cause of the disease, targeted treatment.