Mothers of Preterm Infants Have Individualized Breast Milk Microbiota that Changes Temporally Based on Maternal Characteristics.

Summary Mother’s milk contains complex microbial communities thought to be important for colonizing a preterm infant’s gastrointestinal tract. However, little is known about the microbiota in the preterm mother’s milk and factors influencing its composition. We characterized the temporal dynamics of microbial communities in 490 breast milk samples from 86 mothers of preterm infants (born