THE HARVARD MEDICAL SCHOOL GUIDE TO Healthy Eating During Pregnancy This page intentionally left blank THE HARVARD MEDICAL SCHOOL G UIDE TO Healthy Eating During Pregnancy W. Allan Walker, M.D. with Courtney Humphries Recipes by Lisa O’Gorman, C.E.C. Copyright © 2006 by The President and Fellows of Harvard College. All rights reserved. Manufactured in the United States of America. Except as permitted under the United States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a data- base or retrieval system, without the prior written permission of the publisher. 0-07-149043-4 The material in this eBook also appears in the print version of this title: 0-07-144332-0. All trademarks are trademarks of their respective owners. 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If you’d like more information about this book, its author, or related books and websites, please click here. I dedicate this book to my daughter, Dr. Kim Walker; my daughter-in-law, Heather McDonald Walker; and my nieces, Dr. Beth Eames Littlejohn and Pam Henley— all of whom have recently delivered healthy, full-term newborns. This page intentionally left blank For more information about this title, click here Contents Preface xiii Acknowledgments xvii Introduction: Good Nutrition Begins Before Birth xix 1 How to Prepare for Pregnancy 1 Reach a Healthy Weight Before Pregnancy 3 Take a Folic Acid Supplement Every Day 6 Iron Up 7 Begin to Improve Your Diet 8 Reach a Healthy Activity Level 10 Address Unhealthy Habits 11 Get Any Medical Conditions Under Control 12 Improve Your Fertility with Nutrition 12 Planning for Pregnancy: The Bottom Line 17 vii viii Contents 2 How Pregnancy Works 19 What It Takes to Make a Baby 19 The First Trimester: Laying the Foundation 21 The Second Trimester: Growing and Growing 26 The Third Trimester: Preparing for Life Outside 27 Understanding Fetal Nutrition 27 Your Health in Pregnancy: The Bottom Line 29 3 Why Fetal Health Lasts a Lifetime 31 Metabolism and Health 32 The Origins of Fetal Programming 33 Disease Can Be a Result of Incorrect Planning 37 How Programming Works 38 Putting the Hypothesis to the Test 40 What Does Fetal Programming Mean for You? 41 Is Fetal Programming a Threat to Mothers? 42 Fetal Programming: The Bottom Line 43 4 Eating Well for Your Baby-to-Be 45 Special Needs in Pregnancy 47 Make Food Choices That Maximize Nutrients 54 The Beauty of Balance 62 How to Bring Your Diet into Balance 64 Managing Food Cravings 65 Nausea and Vomiting 68
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