There are three main reasons for bleeding on the 47th day of pregnancy: 1. Pre-eclampsia miscarriage. Pre-eclampsia usually occurs in early pregnancy and can be accompanied by a little abdominal pain, and the development of the gestational sac in the uterus is normal during ultrasound examination. 2. ectopic pregnancy. If ectopic pregnancy occurs with vaginal bleeding and severe abdominal pain, consider the possibility of ectopic pregnancy rupture. It should be treated in hospital in time to avoid delaying the condition. 3. Gravidity. If vaginal bleeding occurs in early pregnancy and ultrasound examination reveals intrauterine honeycomb tissue without a normal gestational sac, and the uterus is obviously enlarged, consider the possibility of staphyloma. At this time, a diagnostic scraping and pathological examination should be performed in time to clarify the diagnosis and timely treatment.