Babies born to mothers who reported poorer sleep quality late in pregnancy weighed less than other babies during their first six months but more by ages 1 and 2, according to a study in the American Journal of Preventive Medicine reported by Medical Xpress. The link was strongest among boys and babies born at full term.
The study is observational. It found an association, not proof that poor maternal sleep causes childhood weight gain, and it does not mean a tired pregnant parent has harmed their baby.