# ovulation is the main event > - Not your period > - You can only experience a true menstrual period after ovulation > - Regular ovulation is a sign of health > - only possible when endocrine & reproductive systems functioning normally > - Crucial for maintaining optimal health during reproductive years > - Progesterone is important > - Progesterone mitigates effects of oes > - Unopposed oes known to promote cell growth in breast cancer and endometrial cancer > [[The Fifth Vital Sign by Lisa Hendrickson-Jack#^kkxxz]]