Under normal circumstances, 1 month after the abortion, will come to menstruation, if 1 month after the abortion did not come to menstruation, you need to consider the possible existence of uterine cavity adhesions, or re-pregnancy. In addition, it also depends on the thickness of the uterine lining, and the state of hormone levels, the uterine lining will begin to repair after the abortion, while ovarian ovulation will quickly return to normal. Normal women will enter a new menstrual cycle after the lining is repaired, and normal menstruation will resume in 1 month. If you have sex in the middle of this process and do not use contraception, it may lead to another unwanted pregnancy. For women after abortion, they should pay attention to hygiene, at the same time, after resuming sexual intercourse, they should take proper contraceptive measures, and if their menstruation does not come on time, they should have a check-up at any time.