Hormonal Signals Explained

The release of progesterone during the luteal phase signals the brain to pause ovarian activity, creating a "wait and see" period for potential fertilization. Birth control pills mimic this hormonal environment by using synthetic progestins, which continuously inform the brain that ovulation is not necessary. This constant hormonal message prevents the natural fluctuations that typically occur in a menstrual cycle, keeping estrogen from becoming the dominant hormone.