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The Period Brain : The new science of the luteal phase - and how to thrive through it - Dr Sarah Hill

The Period Brain

The new science of the luteal phase - and how to thrive through it

By: Dr Sarah Hill

Paperback | 25 September 2025

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Everything you were never told about your hormones – and how to make them work for you

Do you ever wish you could skip the week leading up to your period? So many of us feel like we’re riding a premenstrual roller coaster every month and, as women, we’ve learned to accept it – until now.

In this transformative book, award-winning researcher Dr Sarah Hill explains why during the luteal phase – the second half of our cycle – we feel emotional, bloated, tired, anxious and even depressed, and, most importantly, what we can do to avoid experiencing the same crash every month.

Drawing on the very latest research, you’ll find out how to:

· Sidestep PMS ‘cravings’ by eating more – you burn up to 11% extra calories in the luteal phase!

· Exercise in a way that’s invigorating instead of draining

· Understand your sex drive and why it changes across the month

· Navigate motivational and energy dips without added stress

· Use anti-inflammatory foods to ease PMS

Providing you with a science-backed roadmap to understanding PMS and the more severe form, PMDD, this book will empower you to finally take control and feel at your best whether you have your period or not.

About the Author

Dr Sarah Hill is the author of This is Your Brain on Birth Control , as well as an award-winning researcher who has spent most of her 20+ year career studying women, relationships, and health. In addition to having established a highly successful health and relationships lab at TCU, she has published nearly 100 academic research articles, is a sought-after public speaker, and sits on the scientific advisory boards for women's health companies such as Flo and 28 Wellness.

Her research is regularly covered by large media outlets such as The Washington Post, The New York Times, and many others, and is published in highly prestigious journals, including Journal of Personality and Social Psychology, Psychoneuroendocrinology, Psychological Science, and Health Psychology.
Industry Reviews
This book is not just about understanding PMS – it’s about reshaping our approach to health, diet, and relationships in a way that truly serves the female experience. -Dr Jolene Brighten, Fellow of the American Board of Naturopathic Endocrinology, Menopause Society Certified Practitioner, Certified Sex Counselor

Dr Sarah Hill provides readers with empowering, science-based strategies to help them harmonise with their natural cycles, making this book an important resource for women seeking to understand and thrive in their bodies. -Dr Sara Szal, Author of New York Times bestselling Women, Food, and Hormones

This book is a much-needed scientific and practical guide that finally gives the luteal phase – and women’s experiences during it – the attention it deserves. -Nicole Jardim, Certified Women’s Health Coach and author of Fix Your Period

The Period Brain delivers exactly what was needed: a long-overdue exploration of the second half of the menstrual cycle. -Lara Briden, Naturopathic doctor and author of Period Repair Manual

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