About the Authors

Kathryn B. H. Clancy

kclancy@illinois.edu

Affiliation Laboratory for Evolutionary Endocrinology, Department of Anthropology, University of Illinois, Urbana-Champaign, Urbana, Illinois, United States of America

Angela R. Baerwald

Affiliation Department of Obstetrics, Gynecology and Reproductive Sciences, University of Saskatchewan, Saskatoon, Saskatchewan, Canada

Roger A. Pierson

Affiliation Department of Obstetrics, Gynecology and Reproductive Sciences, University of Saskatchewan, Saskatoon, Saskatchewan, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KBHC ARB RAP. Performed the experiments: KBHC ARB RAP. Analyzed the data: KBHC. Contributed reagents/materials/analysis tools: KBHC ARB RAP. Wrote the paper: KBHC ARB RAP.