Winner of the 2019 National Indie Excellence Award for Women's Health! 28 Days is the book that launched the movement to live in sync with your menstrual cycle. First published in 2005, this all-new updated and fully expanded edition shows women with healthy, natural (no hormone birth control) menstrual cycles how their hormones will be impacting their mood, energy, health, love life, spending habits and much more every day of their cycle.Written by Gabrielle Lichterman--Hormonology® founder, Hormone Horoscope App creator and pioneering women's health journalist--28 Days is based on thousands of scientific studies. Yet, it's easy to use: Simply turn to the day you're on in your cycle and read your Hormone Horoscope for that day!With this hormonal heads-up, you'll be able to take full advantage of hormonal benefits (such as a spike in mood and energy) and prepare to overcome hormonal challenges (such as fatigue and sleep issues), which helps make every day of your cycle better.28 Days is the definitive guide to understanding how the hormones in your cycle impact you in virtually every way. It will immediately change the way you plan your day, week and month ahead.