Aug 12, 2013 1:10 PM by NBC News
A small study suggests babies born by C-section may be lacking helpful gut bacteria.
Researchers in Sweden followed 24 infants for their first two years of life, nine of whom were delivered by C-section.
They found the babies born by C-section were missing a group of gut bacteria. Some didn't develop the beneficial bacteria until they were a year old.
The researchers also found C-section babies had lower levels of a chemical in the blood that could make them more susceptible to allergies.
Researchers say the results are preliminary and larger studies are needed.
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