Painless delivery injections generally have no effect on the fetus and will be metabolized by the body very quickly after delivery. Generally speaking, painless labor injection is to reduce the pain of pregnant women in labor, the specific dosage of the drug needs to be based on the weight of the pregnant woman and the actual situation, and need to be under the doctor’s instructions for the administration of the injection, generally after the use of painless labor injection can reduce the pain of the pregnant woman’s labor. Clinical data show that painless labor injections do not adversely affect the nervous and motor systems, uterine contractions or fetal growth and development. After the delivery, the painless delivery injection will be metabolized by the human body and will not have any adverse effects. However, during labor, pregnant women can listen to the doctor’s advice on whether it is appropriate to have a painless labor to reduce the pain caused by labor.