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Having a kid changes everything from your sleep schedule to the statues of that formerly¹ spare room. The stable of bacteria that living in women's gut² is also transformed when their host becomes pregnant. So finds research in the Journal Cell.

 

The study looked at women in Finland. The women's microbe makeup³ changed dramatically between the first and third trimesters. The array of microbes in the gut went from looking normal in the first three month of a pregnancy⁴ to resembling what's found in patients suffering from metabolic⁵ disease in last three. But some of the symptoms of that condition, like weight gain and slower sugar metabolism⁶ can be beneficial to pregnant women, supporting energy storage that helps a fetus⁷ develop. Other symptoms, like inflammation, demonstrate that the immune system is functioning properly as a pregnancy comes to term. Scientists don't yet fully⁸ understand what brings about the changes in gut bacteria. Immune function is a suspect, but factors like hormonal⁹ signals aren't ruled out. The research suggests that other change to the body, like puberty or old age, could also bring about microbial make-overs.

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