Abortion is not allowed in the 4th month of pregnancy. Abortion is not possible in the 4th month of pregnancy, which corresponds to about 16 weeks of menopause, when the fetus as well as the placenta and amniotic fluid are formed. Abortion is indicated for pregnancies up to 12 weeks of menopause, so a 4-month pregnancy requires hospitalization for midtrimester induction. Before inducing abortion, you should first obtain a certificate of induction of labor, perform routine checkups, perform ultrasound examinations to understand the condition of the uterine appendages, amniotic fluid, placenta and fetus, as well as routine blood tests, blood infection tests, routine leucorrhoea tests, electrocardiogram tests, etc. If there is no abnormality in the examination, you can have a routine abortion. If there is no abnormality in the examination, you can routinely take oral mifepristone with misoprostol to promote the expulsion of the fetus by itself, and then perform the uterine operation, and after the operation, give anti-inflammatory treatment to reduce the uterus. If there is not much bleeding, you can be discharged from the hospital. 7-10 days after the operation, you should routinely perform ultrasound examination to understand the recovery of the uterus.