However in infants born prematurely researchers at Washington University School of medicine in St louis have found that the population of bacteria in babies gastrointestinal tracts may depend more on their biological makeup and gestational age at birth than on environmental factors.
The babies who were patients in the neonatal intensive care unit (NICU) at St louis Children s Hospital ranged from 23 to 33 weeks in gestational age
The researchers noted abrupt changes in each gut s bacterial composition along the way to 36 weeks in gestational age but found that somehow the gut ecosystems adjusted
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