It is not certain whether the baby is born before or after the due date, because the due date is only an approximate time based on the last menstrual period of the pregnant woman, if the projection is accurate and both mother and baby are healthy, then the baby may be delivered within the due date, but it may also be delivered before or after the due date, the specific time error of the birth is about 1 week before and after is possible. 1.Birth before the due date: breech position, multiple pregnancy, abnormal amniotic fluid, placenta The fetus may be delivered before the due date due to factors such as breech position, multiple pregnancies, abnormal amniotic fluid and abnormal placenta. If the fetus is full term and developing well, there is no need to worry; if the fetus is not developing well, it is premature and symptomatic treatment should be given in time to promote fetal development; 2, delivery after the due date: if the woman usually has a long menstrual cycle, the fetus is not yet in the pelvis or affected by genetic factors, it may cause the fetus to be delivered after the due date. As long as the fetus is well developed, she can wait for natural delivery. If there is intrauterine distress or more than 42 weeks of pregnancy, the fetus may have amniotic fluid contamination and fetal distress, so she can choose to induce labor for delivery. In late pregnancy, pregnant women should always be ready to give birth, but also do not be too anxious, if there are no signs of labor at 41 weeks of pregnancy, you should be promptly hospitalized for observation or delivery in due course. In case of combined pregnancy complications such as gestational hypertension and gestational diabetes, the treatment should be individualized.