As a baby slides out of the birth canal, on the way to its first breath, its body becomes coated in its mother’s microbes. This first interaction with outside organisms could be key to shaping the development of the baby’s immune system.
Our microbes, collectively called the microbiome, most often live in harmony with our bodies. They support the immune system, help to digest food and keep the metabolism on track, and fight off disease-causing bacteria. But researchers suspect that mom’s microbiome could play a role in when her children are born, and what happens to them as they grow.
“Most people know about the microbes that colonize the gut,” says Rodney Edwards, M.D., an associate professor in UAB’s Department of Obstetrics and Gynecology. “But there are bugs in and on us in many other sites—our skin, our mouths, our noses, our genitalia.”
During pregnancy, it turns out, the new needs and demands of a woman’s body change the numbers and types of these microbes. Alterations in how the body divvies up nutrients, stores fat, and produces hormones shift the properties of the microbes’ environments. But exactly how the microbiome changes over this nine-month period varies between pregnancies. And these variations, researchers are discovering, could impact not only the well being of a pregnant women herself, but the likelihood of pregnancy complications and the long-term health of a baby.
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