Teaching women and girls how hormones impact their moods, health and behavior all cycle long. Learn more.
Hormonology Books
28 Days:
Updated and Expanded Edition
Winner of the 2019 National Indie Excellence Award! 28 Days is the book that introduced the world to cycle-syncing. Written by pioneering women’s health journalist Gabrielle Lichterman, this updated and expanded edition gives you more daily categories and cycle-syncing tips than the first edition published in 2005.
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Hormonology® Menstrual Cycle
Tracker Journal
In this paperback period-tracker journal, you get 12 sets of comprehensive menstrual cycle tracker charts that help you monitor flow, basal temperature and cervical mucus as well as emotional, physical and health changes throughout your cycle. Plus, you get 12 6-page sets of dot graphs that you can use to shape your data into lists, graphs or logs.
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Hormonology® Day-by-Day Menstrual Cycle Guided Journal
In this guided paperback journal, you get 9 daily self-discovery questions, which enable you to create a custom manual for your menstrual cycle that helps you make every cycle day better. Plus, you get study-backed tips for overcoming cycle-related challenges, recommendations for syncing your life with your cycle and bonus self-discovery questions.
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Hormonology® 2-in-1 Cycle Tracker + Day-By-Day Guided Journal
This 2-in-1 journal combines the Hormonology® Menstrual Cycle Tracker Journal and Hormonology® Day-By-Day Guided Menstrual Cycle Journal into a single volume. In it, you get 12 sets of comprehensive menstrual cycle tracker charts, 12 6-page sets of dot graphs, 9 daily self-discovery questions, tips and recommendations.
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Gabrielle Lichterman is the founder of Hormonology and a longtime nationally-known women’s health journalist. In 2005, she pioneered the movement to live in sync with your cycle and learn all about hormonal effects with the first edition of her book, 28 Days. Learn more about her mission to spread hormone education to women and girls everywhere here.
Best-Selling Hormonology Apps – Hormone Horoscope Period Trackers
The first-and-only menstrual cycle tracker apps that show you how your hormones impact your moods, health and behavior every day of your cycle!
IMPORTANT: All Hormonology apps were permanently retired on January 15, 2023. If you have downloaded them, they will not be deleted from your device. However, there is no ongoing support for the apps. To learn why these apps were retired, please read my Full Statement.
All Hormonology offerings will now be delivered in books. Right now, you can get my daily Hormone Horoscope in my book 28 DAYS: WHAT YOUR CYCLE REVEALS ABOUT YOUR MOODS, HEALTH & POTENTIAL. And you can track your cycle using my HORMONOLOGY MENSTRUAL CYCLE TRACKER JOURNAL, which are available at Amazon. More Hormonology books are coming soon. To get alerted to new books, sign up to my free mailing list.
Hormone Horoscope Lite
Hormone Horoscope Pro
Hormone Horoscope Teen Lite
Hormone Horoscope Teen Pro
Hormone Horoscope Classic
Female Forecaster
Subscribe to the free newsletter to receive useful tips that help make every day of your cycle better
You’ll learn useful, study-proven cycle-related tips including…
- Easy ways to nix anxiety when hormones put you on edge
- How to boost energy on low-pep cycle days
- Tricks to getting better sleep when plunging estrogen triggers insomnia
- Recommendations for nutritional supplements that lessen premenstrual woes
- Ways to ease (and even prevent) menstrual cramps
- And much more!
You’ll also be the first to find out about new apps, eBooks, videos and other Hormonology tools and live chats
