The uterus has returned to normal size on the 21st day of abortion, and if there is any residue in the uterine cavity, it may also affect the normal contraction of the uterus. Induced abortion includes medication abortion and surgical abortion, medication abortion is applicable to women within 49 days of pregnancy, surgical abortion is generally applicable to women within 10 weeks of pregnancy, no matter which type of abortion, the uterus will return to normal size in about 2 weeks, and it has already recovered to its normal size on the 21st day, and the vaginal bleeding has already stopped by this time. If there are residues in the uterine cavity during abortion, it will affect the contraction of the uterus, at this time the uterus may not have fully recovered, and there are still symptoms of vaginal bleeding, which should be handled in time, and the residues usually need to be cleared out by purging the uterus. After the abortion, you should follow the doctor’s instructions to go to the hospital for a follow-up examination to observe the recovery of the uterus.