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Progesterone level falls leading to
Progesterone level falls leading to
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Solution
The correct option is D Menstruation
In human females the menstrual cycle starts with the menstrual phase, when menstrual flow occurs and it lasts for 3 - 5 days. The menstrual flow results due to breakdown of endometrial lining of the uterus and its blood vessels, which forms liquid that comes out through vagina. Menstruation only occurs if the released ovum is not fertilised and consequently, there is a fall in blood progesterone level. Post fertilization, the corpus luteum secretes large amounts of progesterone, which is essential for maintenance of the endometrium.
In human females the menstrual cycle starts with the menstrual phase, when menstrual flow occurs and it lasts for 3 - 5 days. The menstrual flow results due to breakdown of endometrial lining of the uterus and its blood vessels, which forms liquid that comes out through vagina. Menstruation only occurs if the released ovum is not fertilised and consequently, there is a fall in blood progesterone level. Post fertilization, the corpus luteum secretes large amounts of progesterone, which is essential for maintenance of the endometrium.
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