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Question
Menstruation is triggered by an abrupt decline in the amount of ______.
Options
estrogen
progesterone
luteinizing hormone
follicle-stimulating hormone
MCQ
Fill in the Blanks
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Solution
Menstruation is triggered by an abrupt decline in the amount of progesterone.
Explanation:
Menstruation is triggered by an abrupt decline in the amount of progesterone. After ovulation, progesterone is produced by the corpus luteum to maintain the uterine lining. If fertilization does not occur, the corpus luteum degenerates, causing a drop in progesterone levels. This hormonal decline leads to the breakdown and shedding of the endometrium, resulting in menstruation. Thus, the sudden fall in progesterone initiates menstrual bleeding.
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