There is no effect on the fetus at 39 weeks of oxytocic injection. 39 weeks the fetus has gradually developed and matured, at this time at any time may give birth, if the fetus delayed the birth of the fetus can be based on the situation of the fetus to play oxytocic injection, but must grasp the indications of oxytocic injection before injecting oxytocic injection, so as not to lead to the emergence of abnormal reactions. Generally speaking, if there is no movement in the 39th week of pregnancy, you can not use oxytocic injection for the time being, and you need to go to the doctor regularly for ultrasound examination, and if there are indications, you can choose to use oxytocic injection to promote the birth of the fetus. If there are signs of labor, you can choose to have the injection if there are no signs of labor at about 41 weeks of pregnancy. After the injection, it is necessary to maintain a good state of mind, observe the individual’s physical condition, and be ready to wait for labor.