20 days after the abortion coitus, mainly will cause two adverse consequences, as follows: 1, infection: cause vaginal or pelvic inflammation, because after the abortion due to changes in hormone levels in the female body, resulting in vaginal resistance is very low, so this case coitus, especially easy to cause bacterial flora imbalance, inflammation. 2, accidental pregnancy: after the abortion, the ovarian function of the female is affected, so after the abortion Ovulation will be disorganized, there may be ovulation about 20 days after the abortion, if you don’t do a good job of contraceptive measures, it is very likely to have an unwanted pregnancy. If you don’t take proper contraceptive measures, it is very likely that you will have an unwanted pregnancy. If you have another unwanted pregnancy, it will be more damaging to your body if you have another abortion. 20 days after the abortion, if there is no contraceptive measures for intercourse, you must take emergency contraceptive pills or wear a birth control ring in the uterus to prevent pregnancy, in addition to pay attention to observing whether there are abnormalities in the leukorrhea, abdominal pain. If there is an abnormality, timely examination and treatment, if there is no abnormality, there will be no other harm, so there is no need to worry too much.