After induced abortion, there is a residue of the placenta, which in most cases cannot be expelled on its own. Residuals after induced abortion are mainly formed by the placenta, embryonic tissues or blood stasis. The probability of expulsion by itself is very low, and it is usually safer to recommend medication or uterine evacuation treatment. Medication is mainly to use some uterine contraction drugs, such as motherwort granules, etc., to promote uterine contraction, which can promote the discharge of residuals. Alternatively, drugs such as mifepristone can be used to make the residue necrotic and detachable to facilitate expulsion from the uterus. Drugs are not always able to make the placenta residual tissue discharged, must follow the doctor’s instructions to use drugs. If the residual tissue is large, for example, more than 3cm in diameter, the uterus should be cleared. The operation can remove the residue more thoroughly and avoid the residue staying in the uterine cavity for a longer period of time, which may cause infection in the uterine cavity. After induced abortion, pay attention to review the ultrasound, if once determined that there is a residue, you need to timely treatment under the guidance of the doctor, to avoid delaying the condition.