The exact time between the opening of the first finger and the delivery of the fetus in primiparous women cannot be determined, but it usually takes 11-12 hours or 1-2 weeks at the latest, which is mainly determined by the interaction of labor force, birth canal, fetus and maternal mental factors. Under normal circumstances, the opening of the uterus is only a sign before delivery, and the regular contractions are the signs of labor, and after labor, the uterus will continue to open up, and it will take ten fingers to give birth, but the specific time cannot be determined, because the physical condition of each woman and other factors are different, and there are large differences. If the fetus is too big and the fetal head is not in the pelvis, the fetal head will not be able to stick to the inner cervical opening and reflexively cause contractions to strengthen, which will easily lead to primary contraction weakness and prolong the latency period, thus requiring a cesarean section to terminate the pregnancy. In addition, if the opening of the uterus is 3 fingers, the mother should enter the waiting room, closely observe the fetal heartbeat and contractions, and dynamically observe the descent of the fetal head. When the opening of the uterus is 10 fingers, the woman is in labor and needs to prepare for the arrival of the newborn.