Abortion month have sex, but did not take contraceptive measures, can lead to another pregnancy, do abortion surgery, the uterine lining stripped once, equivalent to a menstrual period, under normal circumstances, abortion within a month is required to prohibit coitus. First, the female body has not yet recovered, in order to avoid premature sexual intercourse, causing the occurrence of uterine cavity infection. Second, for effective contraception, after abortion, within half a month to have sex, and did not take contraceptive measures, will be pregnant. Under normal circumstances, the ovary will have ovulation, sperm and egg will combine to develop into a fertilized egg, the possibility of unwanted pregnancy will occur. Three months after the abortion, women can not get pregnant again, just after the abortion of the uterine lining did not recover well, repeated pregnancies abortion, it is easy to lead to thinning of the uterine lining, uterine adhesions, as well as menstrual disorders and so on, need to do a good job of contraception.