How long it takes to give birth with 3 fingers open and painless is not certain, usually several hours to tens of hours, mainly related to the number of times the pregnant woman has given birth, whether the cephalopelvic is proportional and other factors. Painless is painless labor, usually epidural anesthesia, is injected into the anesthesia drug between the vertebrae and spinal fluid, so that the pregnant woman can not feel the pain of contractions. There is no clear indication of the effect of painlessness on the progression of labor, but the prescribed time for prolongation of the second stage of labor is increased by one hour compared to pregnant women who do not use painlessness. Labor is usually longer in primiparous women than in parturients, and parturients dilate significantly faster than primiparous women because of previous dilatation of the uterus. In addition, whether the size of the fetus is proportional to the mother’s pelvis can also affect the progress of labor. If the fetus is too large, or if the fetus is normal and the mother’s pelvis is small, this may lead to prolonged labor with weak contractions, or even cephalo-pelvic disproportion that ultimately requires cesarean section to terminate the pregnancy. Therefore, it is not certain how long it will take to deliver a baby with 3 fingers open, it needs to be examined and guided by the doctor, according to the contractions of the pregnant woman, the fetal heartbeat and the speed of cervical dilatation and other comprehensive judgment.