Text: Jing Ma
美国耶鲁大学医学院的研究人员在“”Cell Metabolism ”期刊上发表了一篇题为“The effects of pregnancy，its progression，and its cessation on human (maternal) biological aging ”的研究文章，主要是研究女性怀孕与衰老的关系。
As we all know, women will experience various hardships during pregnancy, the blood in the whole body will increase, and it will also cause pressure on the circulatory system, because the increase in fluid is prone to physiological anemia, and because the squeezing of internal organs will cause different compensation for various organs in the body.
In addition, women may experience poor sleep and poor food when they are pregnant, so many women will have visible aging when they are pregnant.
However, this study used blood samples to analyze, analyzed 119 pregnant women, and defined the time of delivery of these pregnant women as 0, and at -26.5 weeks, it is about 13.5 weeks according to the expected date of 40 weeks of pregnancy, of course, some people gave birth early, and some people gave birth later.
By the third trimester (-8.8 weeks), which is equivalent to 31.2 weeks of gestation, less than 18 weeks, the PCPhenoAge (assessing the biological age of the individual) increased by 2.39 years, the PCGrimAge (assessing the biological age of the individual, which provides a more accurate measure of the individual's aging status) increased by 1.19 years, and the GrimAge2 (a more granular measure of the individual's aging status) increased by 2.52 years.
That is, the average increase of two years for the three indicators.
18 weeks of pregnancy is equivalent to 4 months, and in 4 months, the mother is two years older, that is, 24 months old, which is equivalent to a 6-fold increase in the rate of aging.
The time from knowing that the mother is pregnant to giving birth to the child is about 8 months, and the time of 8 months is calculated according to the 6 times increase in the aging rate, which is about 4 years old.
In this way, if you have one child and age by four years, you will have three children to be 12 years older, but we will find that some of them have several children, and they still look relatively young.
For example, there is a post-90s mother named Tian Dongxia in Zhejiang, she is 33 years old this year, she gave birth to 9 children, it stands to reason that each child should be 4 years old, and if she gave birth to 9 children, she will be 36 years old, and then 5 will be converted into 18 years old, which is equivalent to giving birth to 9 children, and the original 33 years old became 51 years old, but she gave birth to 9 children, and her early 30s still look like she is in her early 30s, and the whole figure is not much different from that of girls in their 20s.
So this research does not seem to correspond to reality.
So the researchers continued the study, and 68 of the 119 pregnant women provided blood samples about three months postpartum, and the blood samples of these 68 pregnant women were used to study the rate of aging.
The researchers were pleasantly surprised to find that pregnancy does accelerate aging, but it can be dramatically reversed after childbirth. In the three months after giving birth, the biological age of the mother is reversed, and the magnitude of this reversal of aging is about 2~3 times higher than that of aging during pregnancy.
The study also found that some people's biological age was reversed by 8 years, for example, when they were pregnant, they were 30 years old, and their biological age increased by 4 years during the whole pregnancy, which is equivalent to 34 years old, but the three months after giving birth were reversed by 8 years, which is equivalent to being old when they were pregnant, but after giving birth, they rejuvenated and became 26 years old.
Therefore, pregnancy urges people to grow old, but postpartum can make people "rejuvenate".
How can you rejuvenate after giving birth? There are also several important indicators
The first: those who were slimmer before pregnancy are less likely to age
Studies have found that a mother's BMI before pregnancy affects the rate of aging during pregnancy, and if the mother's BMI is high, it is more likely to age. Therefore, if you want to better rejuvenate, it is best to maintain a relatively slim figure before pregnancy, that is, to control it within the normal range, and to be slightly lighter.
For example, a woman's weight is best controlled by her height centimeters minus 55, which is equal to the standard number of pounds of her weight, for example, a height of 1.65 meters, then minus 55 is 110, and the weight is controlled at about 110 pounds, plus or minus 10%, that is, the weight is best within 99 pounds to 121 pounds.
Before the mother is pregnant, the figure is relatively normal or slim, then the mother's absorption of nutrients will be better when she is pregnant, because the body is slim, and our body's ability to store fat will be greatly increased.
Second: exclusive breastfeeding
The study found that mothers who exclusively breastfed had a lower postpartum biological age, about one year younger.
Mother's pure breast milk can give the fat accumulated in the body to the child, and the mother will also consume more balanced nutrients when breastfeeding, so that our body nutrition is more balanced, and mother's breastfeeding can also prevent breast cancer and ovarian cancer, and can also promote postpartum recovery.
This just shows that mothers should pay attention to balanced nutrition, maintain a good mood, and maintain sufficient sleep when breastfeeding in postpartum confinement, which can make our rejuvenation effect better.
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