BREASTFEEDING Breastfeeding: New Anthropological Approaches unites sociocultural, biological, and archae- ological anthropological scholarship to spark new conversations and research about breastfeeding. While breastfeeding has become the subject of intense debate in many settings, anthropological perspectives have played a limited role in these conversations. The present volume seeks to broaden discussions around breastfeeding by showcas- ing fresh insights gleaned from an array of theoretical and methodological approaches, which are grounded in the close study of people across the globe. Drawing on case studies and analyses of key issues in the field, the book high- lights the power of anthropological research to illuminate the evolutionary, historical, biological, and sociocultural context of the complex, lived experience of breastfeeding. By bringing together researchers across three anthropological subfields, the volume seeks to produce transformative knowledge about human lactation, breastfeeding, and human milk. This book is a key resource for scholars of medical and biological anthropology, evo- lutionary biology, bioarchaeology, sociocultural anthropology, and human development. Lactation professionals and peer supporters, midwives, and others who support infant feeding will find the book an essential read. Cecília Tomori is Assistant Professor of Anthropology, Durham University, UK. Aunchalee E. L. Palmquist is Assistant Professor of Maternal and Child Health at the Carolina Global Breastfeeding Institute, in the Gillings School of Global Public Health, University of North Carolina-Chapel Hill, USA. EA Quinn is Associate Professor of Anthropology at Washington University in St. Louis, USA. BREASTFEEDING New Anthropological Approaches Edited by Cecília Tomori, Aunchalee E. L. Palmquist and EA Quinn First published 2018 by Routledge 2 Park Square, Milton Park, Abingdon, Oxon OX14 4RN and by Routledge 711 Third Avenue, New York, NY 10017 Routledge is an imprint of the Taylor & Francis Group, an informa business © 2018 selection and editorial matter, Cecília Tomori, Aunchalee E. L. Palmquist, and EA Quinn; individual chapters, the contributors The right of Cecília Tomori, Aunchalee E. L. Palmquist, and EA Quinn to be identified as the authors of the editorial material, and of the authors for their individual chapters, has been asserted in accordance with sections 77 and 78 of the Copyright, Designs and Patents Act 1988. All rights reserved. No part of this book may be reprinted or reproduced or utilised in any form or by any electronic, mechanical, or other means, now known or hereafter invented, including photocopying and recording, or in any information storage or retrieval system, without permission in writing from the publishers. Trademark notice: Product or corporate names may be trademarks or registered trademarks, and are used only for identification and explanation without intent to infringe. British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library Library of Congress Cataloging-in-Publication Data A catalog record for this book has been requested ISBN: 978-1-138-50288-8 (hbk) ISBN: 978-1-138-50287-1 (pbk) ISBN: 978-1-315-14512-9 (ebk) Typeset in Bembo by Apex CoVantage, LLC CONTENTS List of illustrations vii Notes on contributors viii Acknowledgements xiii Foreword xv Penny Van Esterik 1 Introduction: towards new anthropologies of breastfeeding 1 Cecília Tomori, Aunchalee E. L. Palmquist, and EA Quinn 2 Beyond passive immunity: breastfeeding, milk and collaborative mother-infant immune systems 26 Elizabeth M. Miller 3 Consuming immunities: milk sharing and the social life of passive immunity 40 Aunchalee E. L. Palmquist 4 Breastsleeping in four cultures: comparative analysis of a biocultural body technique 55 Cecília Tomori 5 “Natural, like my hair”: conceptualizations of breastfeeding among African American women 69 Sarah Sobonya vi Contents 6 Breastfeeding and body size 83 Nicola L. Hawley and Pavane Gorrepati 7 Mothers, milk, and morals: peer milk sharing as moral motherwork in Central Florida 97 Beatriz M. Reyes-Foster and Shannon K. Carter 8 Milk, medium chain fatty acids and human evolution 112 EA Quinn 9 Chestfeeding as gender fluid practice 127 Michelle Walks 10 Mixed-feeding in humans: evolution and current implications 140 Melanie Martin 11 Out of the mouth of babes and sucklings: breastfeeding and weaning in the past 155 Siân E. Halcrow*, Charlotte L. King*, Andrew R. Millard, Anne Marie E. Snoddy, Rachel M. Scott, Gail E. Elliott, Darren R. Gröcke, Hallie R. Buckley, Vivien G. Standen, and Bernardo T. Arriaza *Joint first authors 12 Shifting weanling’s optimum: breastfeeding ecology and infant health in Yucatán 170 Amanda Veile and Karen L. Kramer 13 New mothers’ breastfeeding expectations, challenges, and the return to employment 185 Carrie Hough, Erica Prussing, and Kayleigh Applegate 14 Understanding and enabling breastfeeding in the context of maternal-infant needs 199 Kristin P. Tully and Helen L. Ball Afterword: Breastfeeding: in search of the right questions 212 James J. McKenna Index 219 ILLUSTRATIONS Tables 2.1 Selected immunologically bioactive factors in human milk 30 8.1 Global comparative data for the nine most common fatty acids, plus essential fatty acids and DHA and ARA 115 8.2 Descriptive characteristics of the case study sample from Cebu, Philippines 121 9.1 Interview participants who experienced a successful pregnancy 128 12.1 Summary of maternal costs of breastfeeding in the Yucatec Maya, traditional versus contemporary setting 178 Figures 2.1 Model of passive immunity via breast milk 27 3.1 A mother breastfeeding with a supplemental nursing system 47 6.1 Infant body size scale for Samoa 90 8.1 Comparison of percentage of MCFA relative to total fatty acids 116 11.1 Schematic showing expected changes to isotopic ratios during the transition from exclusive breastfeeding to the adult diet 157 11.2 Map giving the location of the northern Atacama Desert, and modern-day city of Arica from which individual Morro1 T17c4 derives 161 11.3 Isotopic profile for left deciduous first molar from Morro1 T17c4. White squares represent δ15N values and dark circles represent δ13C values 162 11.4 Long bone length vs. dental age for individuals from Morro1. The black diamond represents Morro1 T17c4. 163 14.1 Theoretical mother-infant breastfeeding trade-offs over a specific period of time 201 Box 10.1 Mixed-feeding 142 NOTES ON CONTRIBUTORS Kayleigh Applegate is a Masters in Health Administration graduate student at Saint Louis University. She graduated from the University of Iowa with a BA in Anthro- pology for Health Professionals. She was invited to be a student research assistant for Carrie Hough and Erica Prussing through the Iowa Center for Research by Undergraduates (ICRU) after she expressed interest in their research project on new mothers and the return to employment. Bernardo T. Arriaza is a Professor and researcher at the Universidad de Tarapacá, Arica, Chile. His work focuses on bioarchaeology and the study of eco-contaminants in ancient Andean populations. Helen L. Ball is Professor of Anthropology at Durham University, UK, where she founded and directs the Parent-Infant Sleep Lab and the Infant Sleep Info Source website. Her research examines parent-infant sleep, infant feeding, and infant mor- tality. She serves as Chair of the Scientific Committee for the Lullaby Trust, UK. Hallie R. Buckley is Professor in the Department of Anatomy at the University of Otago, New Zealand. Her work focusses on biocultural adaptations to the island environment in early colonising populations in the Pacific islands and has high- lighted the vulnerability of mothers and infants in these colonising situations. Her work on later more established Pacific populations has also investigated early life stress, particularly in areas where malaria was endemic. Shannon K. Carter is Associate Professor of Sociology at the University of Cen- tral Florida, USA. Her research focuses on social inequalities, reproduction, and mothering. She is currently conducting research on African American mothers’ breastfeeding experiences and peer breast milk sharing in Central Florida. Her col- laborative research with Beatriz Reyes-Foster on peer milk sharing is published in Notes on contributors ix several outlets, including articles in Breastfeeding Medicine and the Journal of Human Lactation. Gail E. Elliott is a PhD Candidate in biological anthropology at the University of Otago, New Zealand, researching human growth as an indicator of physiologi- cal stress in past populations. She also has a research interest in gross anatomy and forensic anthropology. Pavane Gorrepati is a Research Assistant in the Department of Chronic Disease Epidemiology at the Yale School of Public Health, USA. Her interests are on the roles that gender gaps play in improving maternal and child health. She has pub- lished a children’s book entitled Girls Can! Do Anything as part of her work to inspire young girls about the endless possibilities they have. Darren R. Gröcke is Associate Professor (Reader) in Stable Isotope Geochemistry at Durham University, UK, and is the director of the Stable Isotope Biogeochem- istry Laboratory (SIBL), located in the Department of Archaeology at Durham University. Siân E. Halcrow is Associate Professor in the Department of Anatomy at the Uni- versity of Otago, New Zealand. She assesses infant and child health in the past to answer central archaeological questions of subsistence, fertility, and health change with the intensification of agriculture. She does this by applying a range of methods including bone growth, dental and skeletal pathology, and indicators of diet and weaning within a biocultural framework. Nicola L. Hawley is Assistant Professor of Epidemiology and Anthropology at the Yale School of Public Health, USA. Her research focuses on maternal obesity dur- ing pregnancy and the challenges it presents for long-term maternal and child health. Her work on breastfeeding has been primarily conducted in the Pacific Islands of Samoa and American Samoa. Carrie Hough is Associate Professor of Anthropology and chair of the Public Health Program at Augustana College, USA. Her current research examines new mothers’ prenatal expectations of parenting and their postnatal realities, particularly around the return to employment. This work on the intersections of reproduc- tive and productive labor coupled with her own experiences as a breastfeeding employed mother catalyzed her engagement with the anthropology of lactation and breastfeeding. Charlotte L. King is a Postdoctoral Research Fellow at the University of Otago, New Zealand. Her work focusses on the use of tissue chemistry to trace changes to human diet over the life course. She is currently particularly interested in how breastfeeding, weaning, and nutritional stress interact, and how these interactions may be visible in archaeological skeletal and dental tissues.