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Menstrual phase

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The menstrual phase marks the beginning of a new cycle if fertilization does not occur.
Updated On: Jan 13, 2026
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Solution and Explanation

Ovarian events: Corpus luteum degenerates without fertilization. Uterine events: Endometrial lining is shed, resulting in bleeding. Hormones: Progesterone and estrogen levels drop, initiating menstruation.
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