Book excerpt: MENSTRUATION ISN'T JUST ABOUT HAVING BABIES Your menstrual cycle is a vital sign, just like your pulse, temperature, respiration rate, and blood pressure. And it provides you with essential information about your health.The Fifth Vital Sign: Master Your Cycles and Optimize Your Fertility brings together over 1,000 meticulously researched scientific references in a textbook-quality guide to understanding your menstrual cycle. In this book you’ll learn: –What a normal cycle looks like; –The best way to chart your cycle and increase your fertility awareness; –How best to manage critical aspects of your health, including better sleep, exercise and a healthier diet; –Natural methods for managing period pain and PMS; –How to successfully avoid pregnancy without the pill; and –How to plan ahead if you do want to get pregnant. The Fifth Vital Sign aims to better connect women with their menstrual cycles, to break the myth that ovulation is only important when you're ready to have a baby. READ THE FIFTH VITAL SIGN TO BETTER UNDERSTAND YOUR HEALTH AND FERTILITY Whether children are a part of your future plans or not, your health matters. Start learning more now, and take control of your health. ABOUT THE AUTHOR Lisa Hendrickson-Jack is a certified Fertility Awareness Educator and Holistic Reproductive Health Practitioner. She teaches women to chart their menstrual cycles for natural birth control, conception, and overall health monitoring. In her work, Lisa draws heavily from the current scientific literature and presents an evidence-based approach to fertility awareness and menstrual cycle optimization.