Sex cannot play a role in inducing labor. Sexual intercourse during pregnancy will stimulate uterine contractions and the opening of the uterus, which will easily lead to placental abruption or preterm labor, intrauterine infections and so on. During pregnancy, especially in the first three months and the second three months, in order to protect the health of mother and child, sexual intercourse is prohibited to prevent miscarriage, premature labor and so on. If a pregnant woman reaches the second trimester of pregnancy and does not have symptoms of labor and needs to be induced, she needs to go to the hospital, and can use water balloon pressure, oxytocin, etc. to stimulate uterine contractions, so as to appear the symptoms of labor, and to help the delivery of the baby. The labor must be induced under the guidance of obstetricians and gynecologists, do not blindly deal with, to prevent hemorrhage, infection, and even life-threatening and other possibilities.