For mice, birth mode matters when it comes to weight. Within their first years of life, pups born by C-section gained more weight than mice born vaginally, researchers report. Scientists attribute this heft to different microbiomes — the communities of microorganisms that live in and on the body — in the C-section group.
The results, published October 11 in Science Advances, are the latest hint that a baby’s delivery method has important consequences for future health. By 15 months after weaning, the mice born by C-section had gained 33 percent more weight than the mice born vaginally. That number was even higher — 70 percent — when researchers compared only the female mice.
As fascinating as these results are, they’re from mice, so it’s unclear whether something similar happens among people.
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