A medication abortion is much less harmful than a painless abortion if it can be completely aborted. This is because a medication abortion is a process in which the embryo is removed from the uterine cavity after taking a pill. Painless abortion requires a device to enter the uterine cavity and suck the pregnancy sac out of the uterine cavity. But there are also conditions for medical abortion: 1, the embryo of pregnancy can not be greater than 49 days, otherwise it is still necessary to clear the uterus; 2, when taking medication for medical abortion should pay attention to the patient preferably do not have nausea, vomiting reaction, because if there is such a reaction, after taking the medication will easily lead to vomiting out, and lead to the failure of medical abortion. In addition, medical abortion can not guarantee 100% all can be successful, about 10% of people may not be successful, so be prepared for these aspects.