Commonly used methods of inducing labor include isacridine intra-amniotic injection, mifepristone with misoprostol, and water bladder, etc. Different methods of inducing labor need to be chosen according to the week of pregnancy and the individual condition of the pregnant woman. 1. Ethacridine intra-amniotic injection for labor induction: it is suitable for pregnant women with normal amniotic fluid volume at 16-28 weeks of gestation, and has the advantages of simple operation, short induction of labor, and a high success rate of more than 95%, which makes it the first choice for induction of labor in mid-term pregnancy. However, it is contraindicated in patients with acute and chronic liver and kidney diseases. 2. Mifepristone with Misoprostol: commonly used to terminate 10-16 weeks of pregnancy, high success rate, can greatly reduce the complications of induced abortion, but the liver and kidney function damage is prohibited. 3. Induction of labor by water bladder: it causes contractions through mechanical stimulation and is suitable for those who have heart, liver and kidney diseases and are not suitable to use drugs to induce labor. However, the success rate is low and easily complicated by uterine infection. Pregnant women are advised to choose the appropriate induction method according to the doctor’s instruction while understanding the advantages and disadvantages of different induction methods.