Bleeding for more than 40 days of pregnancy, like a period, with a relatively large amount, is most commonly seen clinically in intrauterine pregnancy abortion. Because the patient’s embryo is not well developed, or there is endocrine disorder disease, or other reasons cause the embryo to stop developing, the patient will have bleeding. Because after the embryo stops developing, the levels of estrogen, progesterone and blood chorionic gonadotropin in the patient’s body will decrease, the embryo loses the support of hormone levels and will peel off from the normal uterine lining, so bleeding will occur, and the patient is mostly accompanied by a drop and pain in the abdomen. In addition, if the patient has an ectopic pregnancy, the activity of the gestational sac is relatively low, and more bleeding can also occur. Patients with cervical or vaginal lesions can also bleed more. Therefore, patients need to determine the exact cause by checking ultrasound, gynecological internal examination, and changes in blood chorionic gonadotropin and progesterone.