- Publish Date
- Monday, 31 August 2015, 1:39PM
If you're a firstborn girl and have always felt like your little sister is genetically blessed... we have some (bad) news for you.
A new study has revealed that firstborns were nearly 30 percent more likely to be overweight and 40 percent more likely to be obese than their younger siblings were.
It's not to do with genetics though, it's apparently to do solely with birth order.
As reported by Today.com, researchers suspect that conditions in a woman's uterus change after her first baby is born which reprograms metabolism and the regulation of fat for the next newborn.
The new study was of more than 26,000 Swedish women and was analysed by Wayne Cutfield- a professor of pediatric endocrinology at the Liggins Institute in New Zealand.