Normal bleeding after abortion is usually clean in about 10 days, if the bleeding is still brown blood after 20 days, it may be that the abortion is not clean or the uterine lining in the uterine cavity is not completely repaired, so you need to go to the hospital for examination at this time. If it is a natural abortion, in the process of abortion has not done any surgical operation, the embryo is not fully developed and discharged from the body, this time should also be in 10-15 days clean. If there is still vaginal bleeding, and it has not been cleared after 20 days, it can also be considered that the abortion has not been cleaned up, and there may be residuals in the uterine cavity. The same applies to abortion and medication. If there is residue in the uterine cavity is not clean, there can be more than 20 days after the abortion still have brown blood, so as long as there is still brown blood more than 20 days after the abortion, you need to go to the hospital in a timely manner to check what the cause of the bleeding is, need to do further treatment, after the examination to decide what kind of treatment to do.