Menstruation is triggered by an abrupt decline in the amount of
A
Luteinising hormone
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B
Follicle-stimulating hormone
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C
Estrogen
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D
Progesterone
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Solution
The correct option is D Progesterone Progesterone is the hormone which is released by the corpus luteum and the placenta. The hormone is known as the pregnancy hormone which helps in the maintenance of the cell lining of the endometrium. When the released egg is not fertilised, then the level of progesterone decreases as the corpus luteum degenerates. The low level of progesterone results in shedding of the cells from the uterine wall causing menstruation.