Her research program focuses on the adaptive value of social behavior in the Pan species, and integrates the unrivaled Gombe chimpanzee long-term dataset with new hormonal and nutritional data. Today, she will present an overview of her research program and then delve into recent research on how chimpanzee mothers influence offspring outcomes. She will place this work in the larger context of understanding female reproductive variance, and explore how her results relate to maternal effects in humans.