How much blood does spontaneous abortion have to shed?

Generally, there will be signs of threatened abortion before spontaneous abortion, vaginal bleeding, and then abdominal pain. Starting from the first day of vaginal bleeding, under normal circumstances, the bleeding time of spontaneous abortion is 7 to 10 days. If vaginal bleeding exceeds 10 days, you should go to the hospital for a color ultrasound examination in time. If there is a need for incomplete abortion, you can clear the uterus.