Having a Younger Sister Increases Your Chances of Becoming Overweight, and Here’s Why

If you have a younger sister, you are more likely to be overweight

Having a younger sister can be very fun for a girl. They can talk about many things and share everyone’s clothes. But what if we told you that you run the risk of being overweight simply because you were born of your sister?

At Bright Side, we are also surprised to discover it ourselves and have explored this issue to understand the possible causes of overweight an older sister because of her birth order.
A study of 13,406 Swedish siblings born between 1991 and 2009 found that first-borns had a higher body mass index (BMI) and were more likely to be overweight or obese. According to the study, older siblings were slightly lighter at birth than their younger sisters, but when they grew up and waited for children, their BMI was 2.4% higher.

In addition, they found that sisters born earlier are 29% more likely to be overweight than their younger sisters. They are also 40% more likely to be obese.

What could be the cause of these alarming results? There are theories. One of these theories is scientific, Professor Wayne Cutfield of the Liggins Institute at the University of Auckland claiming that the blood vessels that provide the nutrients to the fetus seem slightly thinner at the beginning of pregnancy. As a result, nutrient intake can be reduced, which increases the risk of the person storing more fat and having less effective insulin later in life.


Another theory is cultural. Dr. Maria Peña, director of the Weight Management Center at Lenox Hill Hospital in New York, notes that mothers are more likely to overfeed their babies sooner rather than later to maintain a “healthy weight.” This eating habit could last a lifetime.

Fraternal rivalry is another plausible theory. “Maybe the first-born is competing with the second-born for food in the household, maybe more money will be spent on first-born babies,” says Gary Sacks of Melbourne’s Deakin University. in Australia It would be interesting to look for possible social causes.

Do you have a sister? Do you agree that there is a link between a person’s birth order and the risk of being overweight? Tell us your thoughts.

Sources: https://brightside.me/