About the Authors

Alejandra Núñez-de la Mora

To whom correspondence should be addressed. E-mail: a.nunez@ucl.ac.uk

Affiliation Department of Anthropology, University College London, London, United Kingdom

Robert T Chatterton

Affiliation Department of Obstetrics and Gynaecology, Northwestern University, Chicago, Illinois, United States of America

Osul A Choudhury

Affiliation Department of Microbiology, Sylhet Osmani Medical College, Sylhet, Bangladesh

Dora A Napolitano

Affiliation Department of Anthropology, University College London, London, United Kingdom

Gillian R Bentley

Affiliation Department of Anthropology, University College London, London, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

The original idea for the study was conceived by GRB and modified by ANM. Data were collected in London by ANM, DAN, and GRB, and in Bangladesh by ANM. Logistical support and facilities were provided in Sylhet by OAC. Hormonal analyses were conducted by ANM, supervised by RTC who provided support for all laboratory work. Statistical analyses were performed by ANM. ANM and GRB drafted the manuscript, which was edited by RTC and OAC.