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  • Cycles: The Science of Periods, Why They Matter, and How to Nourish Each Phase

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Cycles: The Science of Periods, Why They Matter, and How to Nourish Each Phase Hardcover – February 7, 2023

by Amy J. Hammer (Author), Fatima Bravo (Illustrator)
4.4 out of 5 stars (32)
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PubWest 2023 Book Design Award (Gold)

Reclaim your cycle and support your health with this detailed guide featuring 100+ recipes and practices from RN, and author of How to Grow a Baby, Amy Hammer.

There is no one-size-fits-all guide to your cycle. But registered nurse Amy Hammer arms you with a strong foundation in physiology and hormonal health, explores historical and sociocultural aspects of women’s health, and reimagines the phases of the menstrual cycle as aligning with the four seasons to provide a detailed guide for living well in your body.

    Also included are nutritive recipes (kabocha squash curry soup, seed balls, wild salmon congee), supportive movement practices to incorporate into your whole day (abdomen relief stretch, buddy walking, foam rolling), and self-care rituals and recipes (dandelion-infused breast massage oil, alternate nostril breathing) to guide you through each phase of the menstrual cycle and of life—from the young adult and menstruating years to perimenopause and menopause.

    Become in tune with your internal rhythm, reclaim the meaning of self-care, and cultivate optimal health for every season of life. This comprehensive, body-literate guide includes:

  • 40 nutrient-dense, menstrual-phase specific recipes that support hormonal, emotional, cognitive, gut, and overall health.
  • The science behind menstrual cycles and how hormonal fluctuation impacts your brain, breasts, skin, and weight.
  • How to track your cycle using fertility awareness methods, allowing you to naturally and effectively avoid or pursue pregnancy.
  • Supportive full-body movement, self-care, and nutrition tips that optimize physiological and hormonal health throughout the phases and your lifespan.
Read more
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  1. Print length
    304 pages
  2. Language
    English
  3. Publisher
    Roost Books
  4. Publication date
    February 7, 2023
  5. Dimensions
    6.81 x 1.1 x 9.53 inches
  6. ISBN-10
    1611809061
  7. ISBN-13
    978-1611809060
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Period Power: Harness Your Hormones and Get Your Cycle Working For You
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The Moon Cycle Cookbook: A Holistic Nutrition Guide for a Well-Balanced Menstrual Cycle
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Editorial Reviews

Review

“Amy Hammer separates menstrual facts from fiction in a way that is both friendly and approachable. Packed with crucial information you may have missed in health class, Cycles gives you everything you need to reclaim and embrace all the seasons of your cycle.”—Amanda Laird, registered holistic nutritionist, author of Heavy Flow: Breaking the Curse of Menstruation, and host of the Heavy Flow Podcast
 
“For menstruators, learning about our biology and the intricacies of our menstrual cycle is a crucial part of unlearning the stigma we’ve lived through and the misinformation we’ve maybe been exposed to. Periods are powerful, and with a deeper understanding of our bodily changes, we can make informed decisions to maximize our energies and capabilities according to our menstrual cycles. I love that this book is one step to help do that!”—Nadya Okamoto, author of Period Power: A Manifesto for the Menstrual Movement
 
“In Cycles, Amy J. Hammer has written a remarkably thorough, comprehensive, and accessible guide to the reproductive and sexual health of humans who menstruate. She situates menstrual cycles in context of cycles of life and seasons of nature in a way that enhances our understanding of menstruation. The text presents a finely tuned balance of the complexity and variety of individual cycles with commonalities across cycles and menstruators, with many helpful illustrations. Hammer explains medical terms for anatomy and for physiological processes clearly and concisely, without getting weighed down by jargon. Cycles can be read straight through or in sections of interest, then kept on the shelf as a reference for life.”—Elizabeth A. Kissling, PhD, professor emerita of Gender, Women’s, and Sexuality Studies, Eastern Washington University
 
“Amy Hammer’s Cycles is a modern update to understanding our menstrual cycles. The blend of history with modern-day science and thoughtful illustrations makes Cycles as interesting as a good novel.”—Halley Strongwater, clinical herbalist and founder of Loam Earth
 
“Cycles is the book you always wish you had about your cycle that breaks down the science and history behind menstruation and beyond in an accessible, easy-to-digest way, while offering no-nonsense tips to improve not only your menstrual health but overall health as well. After reading the book, it struck me just how little I knew about something I experience every month.”—Auri Jackson, producer at Buzzfeed and writer, director, and producer of The Spot

“Amy J. Hammer has written a truly comprehensive and compassionate guide to reclaiming your menstrual cycle. Cycles provides women with a ton of insight into how their bodies work and most importantly how to align their daily lives with their menstrual cycles. This is revolutionary information that will help women cultivate optimal health throughout their lives. Definitely one to have on your shelf!”—Nicole Jardim, certified women's health coach and author of Fix Your Period

Review

"Amy Hammer separates menstrual facts from fiction in a way that is both friendly and approachable. Packed with crucial information you may have missed in health class, Cycles gives you everything you need to reclaim and embrace all the seasons of your cycle." —Amanda Laird, registered holistic nutritionist, author of Heavy Flow: Breaking the Curse of Menstruation, and host of the Heavy Flow Podcast

"For menstruators, learning about our biology and the intricacies of our menstrual cycle is a crucial part of unlearning the stigma we’ve lived through and the misinformation we’ve maybe been exposed to. Periods are powerful, and with a deeper understanding of our bodily changes, we can make informed decisions to maximize our energies and capabilities according to our menstrual cycles. I love that this book is one step to help do that!" —Nadya Okamoto, author of Period Power: A Manifesto for the Menstrual Movement

"In Cycles, Amy J. Hammer has written a remarkably thorough, comprehensive, and accessible guide to the reproductive and sexual health of humans who menstruate. She situates menstrual cycles in context of cycles of life and seasons of nature in a way that enhances our understanding of menstruation. The text presents a finely tuned balance of the complexity and variety of individual cycles with commonalities across cycles and menstruators, with many helpful illustrations. Hammer explains medical terms for anatomy and for physiological processes clearly and concisely, without getting weighed down by jargon. Cycles can be read straight through or in sections of interest, then kept on the shelf as a reference for life." —Elizabeth A. Kissling, PhD, professor emerita of Gender, Women’s, and Sexuality Studies, Eastern Washington University

"Amy Hammer’s Cycles is a modern update to understanding our menstrual cycles. The blend of history with modern-day science and thoughtful illustrations makes Cycles as interesting as a good novel." —Halley Strongwater, clinical herbalist and founder of Loam Earth

"Cycles is the book you always wish you had about your cycle that breaks down the science and history behind menstruation and beyond in an accessible, easy-to-digest way, while offering no-nonsense tips to improve not only your menstrual health but overall health as well. After reading the book, it struck me just how little I knew about something I experience every month." —Auri Jackson, producer at Buzzfeed and writer, director, and producer of The Spot

"Amy J. Hammer has written a truly comprehensive and compassionate guide to reclaiming your menstrual cycle. Cycles provides women with a ton of insight into how their bodies work and most importantly how to align their daily lives with their menstrual cycles. This is revolutionary information that will help women cultivate optimal health throughout their lives. Definitely one to have on your shelf!" —Nicole Jardim, certified women's health coach and author of Fix Your Period

Product details

  • Publisher ‏ : ‎ Roost Books
  • Publication date ‏ : ‎ February 7, 2023
  • Language ‏ : ‎ English
  • Print length ‏ : ‎ 304 pages
  • ISBN-10 ‏ : ‎ 1611809061
  • ISBN-13 ‏ : ‎ 978-1611809060
  • Item Weight ‏ : ‎ 2.03 pounds
  • Dimensions ‏ : ‎ 6.81 x 1.1 x 9.53 inches
  • Best Sellers Rank: #365,247 in Books (See Top 100 in Books)
  • Customer Reviews:
    4.4 out of 5 stars (32)

About the author

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Amy Hammer

Amy Hammer

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Amy J Hammer is the author of How to Grow a Baby. Her work focuses on reproductive health, ethical and delicious food, full body movement, and environmental stewardship. She believes that all people deserve access to healthy food, places to move their bodies abundantly and freely, supportive communities, and a clean, healthy ecosystem. Amy is fascinated by how our bodies function and is passionate about empowering others with well-researched information, powerful stories, and always, humor.

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Customer reviews

4.4 out of 5 stars
32 global ratings
Educational AND delicious.
5 out of 5 stars
Educational AND delicious.
Before I got pregnant, there was so much I didn't know. I didn't even know how much I didn't know until I was forced to learn though direct experience. Cycles would have been so helpful if I'd had it back then! But even now I have come to realize how much I take for granted. When menopause comes a knocking, I'll be much more prepared than I was for motherhood, or even puberty. One thing I really love about this book is that it's not just informative, it's also a guide for good living. I've already cooked a few of the recipes in here and I can tell you they nourish the soul and the body. Highly recommend for anyone, but especially women learning to live in changing bodies.
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Top reviews from the United States

  • Amazon Customer
    5.0 out of 5 stars So Informative
    Reviewed in the United States on August 31, 2025
    Format: HardcoverVerified Purchase
    Highly recommend this book to anyone who wants to understand the female body. Written by a WOMAN who has done their research.
    Helpful
     Report
  • Michelle
    5.0 out of 5 stars Must read
    Reviewed in the United States on April 23, 2024
    Format: HardcoverVerified Purchase
    This is a great book for understanding the basics of our cycles and learning how hormones work, how to exercise and eat for each cycle, and just better understand what’s going on within the female body. Easy to read and easy sections.
    Helpful
     Report
  • zita flaherty
    5.0 out of 5 stars Fabulous book
    Reviewed in the United States on October 3, 2024
    Format: HardcoverVerified Purchase
    One of the best books I’ve ready on the cycle- I recommend it to everyone!
    Helpful
     Report
  • Cassandra
    5.0 out of 5 stars Every girl and woman should have this book!
    Reviewed in the United States on April 20, 2023
    Format: HardcoverVerified Purchase
    This book has taught me so much about my body as a woman. The pages are easy on the eyes and there are so many wonderful recipes. My partner enjoyed them too.

    This book has completely changed my perspective and I’ve learned to honor my body and emotions. I feel more wholesome🥰
    2 people found this helpful
    Helpful
     Report
  • mari c
    5.0 out of 5 stars Educational AND delicious.
    Reviewed in the United States on February 20, 2023
    Format: Hardcover
    Before I got pregnant, there was so much I didn't know. I didn't even know how much I didn't know until I was forced to learn though direct experience. Cycles would have been so helpful if I'd had it back then!

    But even now I have come to realize how much I take for granted. When menopause comes a knocking, I'll be much more prepared than I was for motherhood, or even puberty.

    One thing I really love about this book is that it's not just informative, it's also a guide for good living. I've already cooked a few of the recipes in here and I can tell you they nourish the soul and the body. Highly recommend for anyone, but especially women learning to live in changing bodies.
    Customer image
    mari c
    5.0 out of 5 stars
    Educational AND delicious.

    Reviewed in the United States on February 20, 2023
    Before I got pregnant, there was so much I didn't know. I didn't even know how much I didn't know until I was forced to learn though direct experience. Cycles would have been so helpful if I'd had it back then!

    But even now I have come to realize how much I take for granted. When menopause comes a knocking, I'll be much more prepared than I was for motherhood, or even puberty.

    One thing I really love about this book is that it's not just informative, it's also a guide for good living. I've already cooked a few of the recipes in here and I can tell you they nourish the soul and the body. Highly recommend for anyone, but especially women learning to live in changing bodies.
    Images in this review
    Customer image Customer image Customer image
    8 people found this helpful
    Helpful
     Report
  • Brandon McGill
    4.0 out of 5 stars Still read it.
    Reviewed in the United States on August 10, 2025
    Format: HardcoverVerified Purchase
    So I am halfway through reading it. But soo far there Is good stuff in here I bought this book so I can regulate my body and figure out how my cycles effect my disability. But there is quite a bit of anti patriarchy and how we got the poop end of the stick. But they explain it with a lot of quotes and other things. Idk maybe I bought the wrong book but I get there will be a bit of feminism in here but I just want to learn how to support my body so I feel better. You have to sift through it. There is good stuff I do need to read more but I just want answers and how to’s not the history of how we were shunned cause we are women who bleed.
    Customer image
    Brandon McGill
    4.0 out of 5 stars
    Still read it.

    Reviewed in the United States on August 10, 2025
    So I am halfway through reading it. But soo far there Is good stuff in here I bought this book so I can regulate my body and figure out how my cycles effect my disability. But there is quite a bit of anti patriarchy and how we got the poop end of the stick. But they explain it with a lot of quotes and other things. Idk maybe I bought the wrong book but I get there will be a bit of feminism in here but I just want to learn how to support my body so I feel better. You have to sift through it. There is good stuff I do need to read more but I just want answers and how to’s not the history of how we were shunned cause we are women who bleed.
    Images in this review
    Customer image
    One person found this helpful
    Helpful
     Report
  • TheGhostOfDo
    5.0 out of 5 stars A GEM
    Reviewed in the United States on April 17, 2023
    Format: Hardcover
    Like Amy’s first book, How to Grow a Baby, this book is a gem. It’s a great primer on menstrual cycles that everyone (EVERYONE!) needs to read. Shoot, they should use this in schools. Gift this to a young person experiencing menarche or a postpartum mumma. Get one for yourself. Put it out on your coffee table. Everyone needs to know these valuable lessons about the science and culture of the menstrual cycle.
    3 people found this helpful
    Helpful
     Report
  • Noelle Humkey
    1.0 out of 5 stars Not research based
    Reviewed in the United States on January 3, 2026
    Format: HardcoverVerified Purchase
    It's alarming that most of the research sources are not primary sources. Art is nice, recipes nice, but isn't research-based and is mostly hearsay.
    Helpful
     Report