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The Estrogen Errors: Why Progesterone Is Better for Women's Health

In this revealing work, Dr. Jerilynn Prior teams up with Susan Baxter, a medical writer, to explain the controversy over medicine prescribing estrogen for perimenopausal women in the United States, and to detail why progesterone is actually a far more effective, and a far less risk-ridden, approach. Citing long-standing and emerging research, patient vignettes, and personal experience, endocrinologist Jerilynn Prior and writer Susan Baxter tell us how false beliefs on estrogen became entrenched in U.S. medicine and culture, and why business and politics have played a role in this erroneous thinking.

Like most women in Europe, Prior's patients find progesterone the key to dealing with a life cycle transition that, contrary to Western medicine, these authors do not see as a disease. Challenging medical orthodoxy, this work presents arguments and evidence both women and doctors will find compelling and useful.

Author Information

Susan Baxter is a medical writer and social scientist with more than 20 years experience writing on controversial medical topics. She teaches part-time at Simon Fraser University. Her articles have appeared in publications including Family Practice, Medical Post, HealthWatch, Lifeline, and Easy Living.

Jerilynn C. Prior, MD is Professor of Medicine, Division of Endocrinology, at the University of British Columbia. She is Founder and Scientific Director of the Centre for Menstrual Cycle and Ovulation Research, and has authored research published in journals including The New England Journal of Medicine and the Journal of the American Medical Association. Prior is a Diplomate of the American Board of Internal Medicine, and a Fellow of the Royal College of Physicians and Surgeons, of Canada. As a clinician and researcher, she has treated thousands of women. Prior has been Visiting Lecturer across Canada and the United States at schools including the New York Academy of Sciences, Harvard School of Public Health, and Albert Einstein Medical School. In 1985, Prior won a Nobel Peace Prize for her work with Physicians for the Prevention of Nuclear War.

What others are saying about The Estrogen Errors

"Jerilynn Prior can always be trusted to go beyond the surface to what is really happening in women's bodies. She is a true champion in women's health. This book will help you finally understand your body and hormones." 

-Susan Love MD
President of the Dr Susan Love Research Foundation and author of Dr Susan Love's Breast Book 

“In this provocative book, Jerilynn Prior and Susan Baxter raise many key questions that women's health researchers and clinicians have failed to ask or investigate. They are especially effective in deconstructing prevailing myths about "too little estrogen" during the peri-menopause.”

-Judy Norsigian
Executive Director, Our Bodies Ourselves 

"Estrogen Errors" is, quite simply, the truth! Jerilynn Prior has done women a huge service by uncovering the real truth about estrogen and the hidden secrets of progesterone! A must read for anyone concerned about women's health."

-Christiane Northrup MD
Author of The Secret Pleasures of Menopause, The Wisdom of Menopause, Women's Bodies, Women's Wisdom, and Mother-Daughter Wisdom.  

"Estrogen Errors tells the story of efforts to set the record straight about how healthy ovulatory menstruation - with its ebb and flow of estrogen and progesterone - protects our hearts, breasts and bones and details with sound scientific evidence the implications of this knowledge for women's health. It is also a call to action for women to become body literate. We owe it to ourselves and our daughters to understand and appreciate our bodies if we want to make conscious, informed decisions about our health throughout our reproductive lives - from menarche through to menopause and beyond..."

-Laura Wershler
Executive Director, Sexual Health Access Alberta 

Estrogen Errors is now available in hardcover and as an e-book!

You can order your copy at your favourite online retailer, including:

Barnes and

Or visit your local bookseller and request a copy using the following ISBN number:

ISBN 0-313-35398-0 or ISBN 978-0-313-35398-7

A portion of all proceeds from the sale of The Estrogen Errors will be donated to the CeMCOR Endowment Fund to ensure that the research and outreach intiatives of the Centre for Menstrual Cycle and Ovulation Research continue well into the future.

Estrogen Errors has its own web page and blog

Follow us online at 

The Estrogen Errors Blog

Life Phase: 
Perimenopause, Menopause
Updated Date: 
December 9, 2013

Estrogen’s Storm Season: Stories of Perimenopause

Estrogen's Storm Season

by Dr. Jerilynn C Prior

New second edition available

Estrogen’s Storm Season is now available in BOTH print and eBook (Mobi and ePUB) versions!

All royalties are recieved in our Endowment fund (overseen by UBC) and support CeMCOR's research and future.

It is full of lively, realistic stories with which women can relate and evidence-based, empowering perimenopause information. It was a finalist in 2006 for the Independent Publisher Book Award in Health.

Purchase your ebook copy via our Amazon Kindle or
Google Play storefronts!

Paperback copies (with updated insert) still available here.

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