Patients can have a painless abortion within 70 days of pregnancy, which is a little more than 2 months of pregnancy. The gestational sac is relatively small within 70 days of pregnancy, usually around 3.0cm, and no placenta has formed and the fetus has not taken shape, so the success rate of the procedure is higher when doing a painless abortion, using a suction tube to be able to suck out the gestational sac and meconium directly. If the patient is more than 70 days pregnant, the placenta has already formed, so the gestational sac is more closely connected to the patient’s uterus through the placenta, and the gestational sac is larger, the meconium is more numerous or the fetus is already formed, in this case, it is difficult to perform a painless abortion with a suction tube. There is a risk of hemorrhage or excessive damage to the endometrium during the procedure, so it is not recommended that patients undergo painless abortion in this month.