First, the development of fetal organs is uneven, such as lungs, which develop very late. Although the lungs have reached the state of spontaneous breathing after birth at 37 weeks of pregnancy, they are still not fully mature, and infants are prone to respiratory distress after birth, which can be life-threatening. Secondly, apart from dyspnea, babies born at 37 weeks are in worse physical condition than babies born at 39 weeks, and are more prone to complications, such as hypoglycemia, feeding difficulties and infection.
Although it has reached the third trimester, the lungs, liver and brain of the fetus are still developing. Two more weeks in the womb can make these organs more mature and perform much better after birth than a 37-week-old baby. So if it's not for physical reasons, it's best to wait for the baby to be born at full term.
Some pregnant mothers choose early caesarean section because they want their children to catch up with the school age in September. A year of self-study at night is not necessarily a bad thing for a child, but it can add another year to his colorful childhood; But because you cut the baby's body two weeks in advance, it's not worth the candle.