The best time to have a painless abortion is within 10 weeks of pregnancy, and the pregnancy can be terminated by drug induced abortion at around 3 months of pregnancy. In the third month of pregnancy, the placenta has been formed, the fetal bones and organs are fully developed, at this time to do painless abortion is very harmful to the mother, there is a high risk of residual uterine cavity, haemorrhage, uterine perforation, amniotic fluid embolism and other situations during the abortion procedure, failure to rescue in time can cause life-threatening. If you want to terminate your pregnancy in the third trimester, you will generally need to be hospitalized to induce abortion, most commonly through the application of mifepristone and misoprostol, which can soften the cervix, induce degeneration and necrosis of the uterine meconium, make the embryo and uterus more easily detachable, and excite the uterus, thus promoting uterine contraction and speeding up embryo expulsion. If the placental tissue is not fully expelled, the uterus can then be cleared so that the endometrial residue is completely expelled. Therefore, women who are not planning to have children should use effective contraceptive measures when having sex. In case of an unplanned pregnancy, it is important to decide whether to terminate the pregnancy as soon as possible after the pregnancy is clear, so as not to delay the best time for abortion, the larger the month, the greater the risk to the woman’s health when inducing labor.