Newborns born by cesarean section at 39 weeks and 40 weeks are normal full-term newborns, and there is generally no significant difference for the fetus, but there may be some differences for the pregnant woman. If there are clear indications for surgery, elective surgery is usually recommended, and for elective surgery, it is usually chosen to be performed around 39 weeks instead of having to wait until 40 weeks, when elective surgery is performed, mainly to avoid emergency cesarean delivery, especially for pregnant women giving birth for the second time, to prevent acute symptoms such as premature rupture of fetal membranes from occurring, which is beneficial to the health of both the pregnant woman and the fetus. In contrast, when a cesarean section is performed at 40 weeks of pregnancy, many pregnant women will be in labor, which means that many of them will not be able to wait until 40 weeks before the onset of labor, at which time the operation usually requires the choice of an emergency cesarean section, which may not be as well prepared as an elective operation. Therefore, for pregnant women who want to have a cesarean section, elective surgery is usually recommended at 39 weeks. Before the operation, pregnant women need to regulate their emotions, wait for the delivery with peace of mind, and choose the right time for the cesarean section after the doctor’s examination and evaluation to avoid excessive anxiety and stress affecting their own health and that of the fetus.