It is generally normal that the fetus has not started at 38 weeks of pregnancy. Between 37 and 41 weeks of pregnancy, the fetus may be delivered naturally at any time, and all fetuses at this gestational week are full-term, so there is no need to worry too much. Pregnant women should pay attention to rest and prepare for delivery, because the fetus may start at any time. At the same time, you should pay attention to monitor the fetal heartbeat and fetal movement, if there is any abnormality, you should deal with it in time, and keep your maternity check. Of course, pregnant women can also promote the fetal launch through appropriate exercise, as follows: 1. Exercise: for example, morning and evening walks, which can promote the secretion of oxytocin in the body of pregnant women, thus promoting fetal launch. In addition, appropriate climbing stairs, doing simple household chores, can also promote the fetus to start. However, attention should be paid to the right amount of exercise, if pregnant women appear fatigue, should immediately stop exercise, to rest, in the exercise is best accompanied by family members to avoid accidents; 2, nipple stimulation: can be under the guidance of the doctor hot compress and massage breast, stimulate the body to produce contractions and speed up the process of labor. Observe whether there are regular contractions, abdominal pain, redness, water breaking, etc. Once such symptoms appear, it means that labor is imminent and you should go to hospital immediately to wait for delivery.