There is residual after medical abortion, the use of urine pregnancy test test paper examination may appear positive results, HCG after medical abortion is a dynamic process of decline, the test paper results are related to the time of testing, it is generally recommended to do the examination about 4 weeks after medical abortion. Examinations are needed after a medical abortion to determine whether there is any residual pregnancy tissue. If there is residual tissue, then the HCG level in the body will be relatively high, and the urine pregnancy test paper may show a positive result. To confirm whether the medical abortion is clean or not, it is recommended that a gynecological ultrasound be done at the hospital. If the abortion is incomplete, it is recommended that the patient undergoes a timely evacuation of the uterus to prevent the pregnancy tissue from becoming infected in the uterus or producing other lesions.