The difference between being born at 37 weeks and at 40 weeks
Apr 24, 2023
Source: Cainiu Health
Dr. Lv Aiming
Introduction
The differences between a 37-week and a 40-week pregnancy mainly lie in birth weight, fetal resistance, and maternal experience. Both 37-week and 40-week fetuses are considered full-term, so the overall differences are not significant. However, if the fetus remains in the uterus for approximately three additional weeks, it can absorb more nutrients, resulting in a slightly higher birth weight.
The differences between delivery at 37 weeks and at 40 weeks are mainly reflected in fetal weight, fetal resistance, and maternal experience. A detailed analysis is as follows:
1. Difference in weight
Both 37-week and 40-week fetuses are considered full-term, so the main differences are not significant. However, if the fetus remains in the uterus for approximately three additional weeks, it can absorb more nutrients, leading to a slightly higher birth weight.
2. Difference in fetal resistance
After reaching full term, the fetus has relatively strong resistance within the uterus. Remaining in the uterus for an additional three weeks allows the fetus to absorb more nutrients from the mother, thereby slightly enhancing its immune resistance.
3. Difference in maternal experience
As mentioned above, the 40-week fetus tends to be slightly heavier, which means the pregnant woman may endure greater physical pressure. During childbirth, vaginal delivery may be somewhat more challenging compared to delivery at 37 weeks.
In summary, although both 37 weeks and 40 weeks are considered full-term, it is recommended, if circumstances allow, to let the fetus develop normally in the uterus and proceed with natural delivery.
