Emily Oster - Expecting Better

PENGUIN BOOKS

EXPECTING BETTER

Emily Oster is a professor of economics at Brown University. She was a speaker at the 2007 TED conference and her work has been featured in The New York Times, The Wall Street Journal, Forbes, and Esquire. Oster is married to economist Jesse Shapiro and is also the daughter of two economists. She has two children, Penelope and Finn.

Praise for Expecting Better

Expecting Better will be a revelation for curious mothers-to-be whose doctors fail to lay out the pros and cons of that morning latte, let alone discuss real science. And it makes for valuable homework before those harried ob-gyn appointments, even for lucky patients whose doctors are able to talk about the rationale behind their advice.

The New York Times

Emily Oster combs through hundreds of medical studies to debunk many widely followed dictates: no alcohol, no caffeine, no changing the kitty litter. Her conclusions are startling.... Expecting Better walks women through medical literature surrounding every stage of pregnancy, giving them data to make informed decisions about their own pregnancy.

New York Magazine

It seems that everyonedoctors, yoga teachers, mothers-in-law, and checkout ladies at grocery storesare members of the pregnancy police. Everyone has an opinion. But not everyone is Emily Oster, a Harvard-trained economics professor at the University of Chicago.... To help the many women who reached out to Oster for advice, she compiled her conclusions in her new book, Expecting Better, which she describes as a kind of pregnancy by the numbers.

New York Post

[Oster took] a deep dive into research covering everything from wine and weight gain to prenatal testing and epidurals. What she found was some of the mainstays of pregnancy advice are based on inconclusive or downright faulty science.

Associated Press

Economist and author Emily Oster contradicts conventional wisdom and advocates a much more relaxed approach to pregnancy.

Daily Mail (London)

Shes such a brilliant researcher and wordsmith.

Parents.com

[Expecting Better] offers expectant mothers a new route to the delivery room.

The Times (London)

A comprehensive and lively debunking of the myths surrounding pregnancy.

The Telegraph (UK)

It took someone as smart as Emily Oster to make it all this simple. She cuts through the thicket of anxiety and received wisdom, and gives us the facts. Expecting Better is both enlightening and calming. It almost makes me want to get pregnant.

Pamela Druckerman, New York Times bestselling author of Bringing Up Bb and Bb Day by Day

Expecting Better is a fascinating and reassuring tour of pregnancy and childbirth, with data leading the way at every juncture. From start to finish, Oster easily leads us through the key findings of the extant pregnancy-related research. My only regret is that my wife and I had three children without the benefit of this insightful approach.

Charles Wheelan, New York Times bestselling author of Naked Statistics

The only antidote to pregnancy anxiety is facts, and Emily Oster has them in spades. Disarmingly personal and easy to read, this book is guaranteed to cut your freaking out in half. Pregnancy studies has a new heroine. Every pregnant woman will cheer this bookand want to take Oster out for a shot of espresso.

Rachel Simmons, New York Times bestselling author of Curse of the Good Girl

This is a fascinatingand reassuringlook at the most important numbers of your pregnancy. It will make parents-to-be rethink much of the conventional wisdom: think bed rest is a good idea? Think again. This may be the most important book about pregnancy you read.

Steven D. Levitt, New York Times bestselling coauthor of Freakonomics

PENGUIN BOOKS

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First published in the United States of America by The Penguin Press, a member of Penguin Group (USA) Inc., 2013

Published in Penguin Books 2014

This edition with revisions to published 2016

Copyright 2013, 2016 by Emily Oster

Penguin supports copyright. Copyright fuels creativity, encourages diverse voices, promotes free speech, and creates a vibrant culture. Thank you for buying an authorized edition of this book and for complying with copyright laws by not reproducing, scanning, or distributing any part of it in any form without permission. You are supporting writers and allowing Penguin to continue to publish books for every reader.

THE LIBRARY OF CONGRESS HAS CATALOGED THE HARDCOVER EDITION AS FOLLOWS:

Oster, Emily.

Expecting better : why the conventional pregnancy wisdom is wrongand what you really need to know / Emily Oster.

pages cm

Includes bibliographical references and index.

ISBN: 978-1-101-61793-9

1. PregnancyHealth aspects. 2. Pregnant womenHealth and hygiene. 3. Prenatal care. I. Title.

RG525.O87 2013

618.2dc23

2012039780

Neither the publisher nor the author is engaged in rendering professional advice or services to the individual reader. The ideas, procedures, and suggestions contained in this book are not intended as a substitute for consulting with your physician. All matters regarding your health require medical supervision. Neither the author nor the publisher shall be liable or responsible for any loss or damage allegedly arising from any information or suggestion in this book.

Version_3

To my sweet Penelope, who inspired this book,

and to my mormor,

who would have loved to meet her.

Thank you, first, to my wonderful book team. My agent, Suzanne Gluck, without whom this project definitely would not have gotten past and who tells me straight up when its not quite there yet. Ginny Smith is some kind of secret genius editor who got this turned into a real book when I wasnt even looking. Thanks to her, Ann Godoff, and the whole team at Penguin for enormous support, genius title creation, and all sorts of other things.

Huge thank you to Jenna Robins, who read everything first, rewrote most of it, made me sound like less of an economist, and without whose help I never would have gotten off the ground.

Emily L. Seet, MD, was an incredible medical editor (although any mistakes remain very much my own). Emily Carmichael created lovely graphs with little guidance. Jen Taylor provided invaluable contracting assistance.

I am grateful to all my ladies, most of whom helpfully got pregnant at the same time and shared their stories (sometimes without knowing theyd be book fodder): Yael Aufgang, Jenny Farver, Hilary Friedman, Aude Gabory, Dwyer Gunn, Katie Kinzler, Claire Marmion, Divya Mathur, and, most especially, Jane Risen, Heather Caruso, Elena Zinchenko, and Tricia Patrick.

Many colleagues and friends supported the idea and reality of this book at various stages. Including but by no means limited to: Judy Chevalier, John Friedman, Matt Gentzkow, Steve Levitt, Andras Ladanyi, Emir Kamenica, Matt Notowidigdo, Dave Nussbaum, Melina Stock, Andrei Shleifer, Nancy Zimmerman, and the More Dudes.

Actually putting the time into writing this would not have been possible without the help of many, many people in running my household. Most important of all, Mardele Castel, who has been Penelopes