Research says that more plump women are more capable of cultivating
An article published in the Proceedings of the National Academy of Sciences says that in the future women may be more petite, fuller, have a healthier heart, shorten their reproductive period, and pass on these characteristics to future generations.
These evidences mean that humans are still evolving.
Medical advancement means that many people who used to die young in the past can now live to the next year, which also makes many people think that natural choices no longer affect humans, we have stopped evolution.
However, Stephen Stearns, a professor of biology at Yale University in the United States, said that although medical advancement has made modern life no longer dependent on human genes, the difference in reproductive capacity, they want to know that women can give birth to more children.Whether features can be passed on to future generations.
To find out, Stearns and colleagues studied data from the US federal government’s Fumingham Heart Research Program, which records the town of Fumingham, Massachusetts.
The medical records of 40,000 residents since 1948, during which many families have spanned three generations.
The research team studied 2,238 women who had passed menopause and could no longer have children.
They tested the weight, height, blood pressure, blood pressure and other characteristics of these women to see if these factors were related to their multiple parenting.
Researchers also control social and cultural factors to calculate the role of natural selection in shaping these characteristics.
The results of the study show that women who are taller, slender, and more petite and fuller are usually more fertile and have more children; lower blood pressure, women with high blood pressure will have more children; youngerWomen who gave birth to their first child and women who came later in menopause also had more children.
Surprisingly, these characteristics were also passed on to their daughters, who also had more children.
Related links: Skinny girls look at nutrition clinics before pregnancy. Researchers predict that if this trend lasts for 10 generations, in 2409, women will be 2 cm shorter and weigh 1 kilogram, and the time to give birth to the first child will be 5Months, the time of menopause will be added for 10 months.
It’s hard to say what these characteristics are, and it’s hard to know if these features are passed through women’s genes.
But because researchers control many social and cultural factors, this result suggests that genes, not cultures, play a role in evolution.
Stearns pointed out that although cultural differences can affect human reproduction, biological characteristics still affect human evolution, which is very interesting.