The duration of pain during labor induction in the 5th month of pregnancy is related to whether the pregnant woman has a previous history of labor. The bouts of pain last about 12-24 hours, with menstruating mothers having relatively short bouts of pain, about 12 hours, and primiparous mothers having relatively long bouts of pain, about 24 hours, depending on the individual. The 5 month induction of labor is mainly through the action of drugs to necrosis of the embryonic meconium, soften the cervix, promote the contraction of the uterus, and successfully expel the fetal placenta tissue after the opening of the uterus. Usually, 1-3 days after the drug is administered, pregnant women may experience paroxysmal abdominal pain, which means the beginning of contractions, the pain at the beginning of contractions can last about 30 seconds with an interval of 5-6 minutes; then the pain will gradually intensify and the interval will be shortened. It is recommended that women pay attention to no sexual life after induction of labor, diet should be nutritious, light and easy to digest, avoid eating cold, spicy and stimulating food; and pay attention to rest and avoid straining.