Medication abortion is to induce the uterus to contract and expel the embryo by itself by taking the relevant medication. The 20 days of pregnancy can only be judged by blood or urine test to determine whether the pregnancy, through ultrasound examination may not be able to see the uterus has fully formed the gestational sac, but also can not judge whether it is a normal intrauterine pregnancy, usually is not recommended at this time to carry out a medication abortion. The prerequisite for medication abortion is to make sure that the pregnancy is intrauterine, and the sac is within 2.5cm, the duration of pregnancy is less than or equal to 49 days, and the relevant medical examination has been done before medication abortion can be carried out. If the pregnant woman is ectopic pregnancy, it is not possible to carry out medication abortion. It is recommended that pregnant women in the 20 days of pregnancy do not carry out a drug abortion, need to continue to wait for another two to three weeks or so, through the ultrasound to determine the gestational sac is in the uterus, the size of the gestational sac is appropriate, to go to the regular hospital, under the guidance of the doctor with the medication for abortion, do not take the liberty of using medication to abort, in order to avoid causing the incomplete medication abortion, hemorrhage and other situations.