Humans Male Female Animals Research Support, Non-U.S. Gov't Adult Middle Aged Aged Research Support, U.S. Gov't, P.H.S. English Abstract Comparative Study Rats Adolescent Child Mice Time Factors Child, Preschool Pregnancy United States Infant Molecular Sequence Data Research Support, U.S. Gov't, Non-P.H.S. Kinetics Infant, Newborn In Vitro