How long it takes to have a normal labor with an oxytocin injection is determined by each woman’s situation. Usually the signs of labor can appear within 24 hours, but there are often slower cases. The substance injected by the oxytocin is generally oxytocin, which can stimulate the uterus to produce contractions to help the birth, mainly related to the number of births, drug sensitivity, whether into the pelvis, cervical maturity, etc. 1, the number of births: in general, for women who injected oxytocin, regular contractions appear sooner in women who are menstruating than in women who are primiparous; 2, drug sensitivity: some women are more sensitive to oxytocin and may After a few minutes of oxytocin injection, the reaction may occur, while the non-sensitive women need 2-3 days; 3, whether into the pelvis: when the head of the fetus has entered the pelvis during labor, the oxytocin injection can help the mother to give birth better, if the fetus can not enter the pelvis because the head is too large, the role of oxytocin injection is relatively small; 4, cervical maturity: cervical maturity mainly refers to the degree of maternal dilatation before delivery, the degree of softening The maturity of the cervix refers to the degree of dilatation and softening of the uterine opening before delivery. The more mature a woman’s cervix is, the greater the dilatation of the uterine opening, the greater the probability of delivery and the faster the delivery will be after the doula injection. Although the use of oxytocin can help reduce the waiting time for delivery by making the uterus contract, there are some women who do not respond to the oxytocin after 3 days or do not meet the contraction requirements for a normal delivery, so it is better to consider a cesarean section to deliver the baby as soon as possible to avoid the impact on the health of the fetus and the pregnant woman.