1. 1 The Monthly Cycle Book

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3. 3 3 Resources http://www.webmd.com/baby/healthtool-ovulation-calculator

4. 4 Day 1: Menstruation Your cycle begins on the first day of blood flow. Day 2-14: Follicular Phase You cervical mucus starts to thin. Day 14: Ovulation Begins mid-cycle, but can vary between day 11-21. The egg is released. Day 15-22: Luteal Phase The lining of the uterus thicken. Day 23-24: Luteal Phase Implantation of a fertilized egg can take place. Hormones produced by pregnancy may be detected by a pregnancy test. Day 25-28: Luteal Phase If pregnancy does not occur, your hormone levels begin to fall. The uterine lining sheds, resulting in your period.

5. 5 Reference http://www.webmd.com/baby/healthtool-ovulation-calculator