Infants exclusively breastfed for their first six months hadlower odds of short sleep duration — defined as sleeping less than 11 hours in 24 hours at age one — than infants who were exclusively formula-fed, researchers found after analysing data from 82,918 mother-infant pairs in the nationwide Japan Environment and Children's Study.
Children who received a combination of breastfeeding and formula also had lower odds of short sleep, suggesting the association was not limited to exclusive breastfeeding.
