There are two ways to induce labor in the fourth month of pregnancy, either intra-amniotic injection of Levanox, or medication induction of labor with oral mifepristone tablets combined with misoprostol tablets. After Levanox injection, you need to observe for 72 hours, waiting for contractions to start, regular contractions to occur, the opening of the uterus, the fetus to deliver on its own, and the placenta to be delivered before performing a clearance procedure. Oral medication to induce labor, generally mifepristone tablets need to be taken at 12-hour intervals of 50mg for 3 days, with misoprostol treatment added for the last one. Observe 6 hours after taking the drug, there will be abdominal pain, vaginal bleeding, fetus and embryonic tissue elimination, generally need to clear the uterus treatment to avoid residual in the uterine cavity. After the operation, pay attention to rest, keep warm, eat a light diet, strengthen nutrition, enhance physical fitness, and pay attention to perineal cleanliness and hygiene.