Why some Families have only boys or girls Harvard Study Reveals | Why only boys or girls are disclosed in study

New Study on Boys & Girls: Children are considered a boon of nature. Every day a large number of children are born naturally. Sometimes a boy is born in someone, sometimes a girl is born. Most of the boys are born in many families, while some family have more number of girls. Have you ever wondered why only boys or only girls are in some families? Most people consider it a game of luck. Scientists of Harvard University also tried to find the answer to the same question. She studied the birth record of more than 58000 women nurses born between 1956 and 2015 and the results came out quite surprised.

Till now it was believed that in every pregnancy, the possibility of being a boy or a girl is equal ie 50-50, but this study has challenged this recognition. According to researcher Dr. Alex Poliakov, now doctors will have to inform that the chances of having a separate gender can actually be less than 50%. Especially when there are many children of the same gender in the family. The study also revealed that women who became a mother for the first time at the age of 29 years or older, all their children are 13% more likely to have the same gender, compared to women who become a mother before 23 years. One reason behind this may be that with aging, the chemistry of the body of women like vagina changes, which can lead to some type of sperm to reach the egg.

This study was only based on mothers, but researchers believe that father -related factors can also play a role in it. This study is just a beginning and in the coming years, this subject will be researched more deeply. So next time when you see only four girls or four boys in a family, then understand that it can be the effect of science, not just a coincidence.