Conducted on mice, it found that rodents born via c-section are more likely to have an unbalanced amount of good and bad bacteria in their stomachs, which basically increases their chances of gaining weight.
This effect was seen more specifically in female mice as the c-section births gained 70% more weight than the mice born naturally. Currently, C-section births are common in many parts of the world, making up 33 percent of births in the USA, and around 50 percent in Brazil, the Dominican Republic, Italy, and Iran.
Study author Dr Maria Dominguez-Bello said: 'Our study is the first to demonstrate a causal relationship between c-section and increased body weight in mammals'.
The new research was conducted on mice after which it was confirmed that the weight gain is linked to the impact of C-section birth on gut bugs.
RG: Why do you think mice born by Caesarian gained more weight? . "We will be able to determine if the microbes restore normal development and find the related human microbes", Dominguez-Bello says. We still have not shown causation by the microbes alone. This change is credited to the fact that bacteria in the stomach of these two groups of mice had grown differently.
RG: How likely is it these findings translate to humans? .
"I am ongoingly enthused by the work of the Dominguez-Bello lab to work through the potential differences between offspring born via Cesarean and those delivered vaginally", Baylor College of Medicine human geneticist Kjersti Marie Aagaard writes in an email to The Scientist. Although of course our microbes are the human versions.
ISTOCK, DENBOMAMice born by Cesarean section grow up to be heftier than their counterparts born vaginally, a new study shows.
The microbiomes of the C-section mice also looked different to those born vaginally. In the USA, C-sections account for 32 percent of births, according to the Centers for Disease Control and Prevention.
C-sections, like antibiotics, are life-saving intervention when needed. C-sections, however, have increased, with doctors in some regions of the world performing them 43 percent of the time. No wonder women choose to have C-sections.