Gender is becoming more and more popular among families. But despite the public’s faith, a new study is not a coin throwing.
Research published in the study Science development Journal Friday has found a “unique probability” regarding whether a family is a boy or a girl, and has found a particular factor that affects the probability.
Researchers analyzed more than 58,000 women with two or more single -toned women from 1956 to 2015, and searching for more than three children were more likely to have same -sex children.
Rather than a 50-50 opportunity to have a boy or girl, a family with three women had a 58 %chance of having another girl, and a family with three boys had a 61 %chance of having another boy.
Then why does this happen?
Researchers point to their mother’s age when she gives birth and genetics.
Women who began to have children after age 28 were slightly more likely to have children of same -sex. This study also confirmed two genes associated with having a boy or the only girl.
Jorge Chavarro, the senior author of the Harvard TH Cold Public Health School, and a nutrition and epidemiologist professor of nutrition and mechanics. Washington Post“We don’t know why these genes are related to sex, but we ask new questions.”
There are several limitations in the study, including that there is no data for father.
In addition, experts from outside the research warned of the genetic analysis of the research.
IAIN MATHIESON, a genetic professor at the University of Pennsylvania, mail Analysis is based on a relatively small sample and can be affected by other factors.
The researchers of this study concluded that more research is needed to study why some of the factors mentioned are more likely to have a child of same -sex children.
“Until then, a family who wants one of two or three children with the same sex must know that when you try one of the following, you are probably throwing coins with two head coins.”
