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Which one of the following is the correct matching of the events occurring during menstrual cycle?

1. Proliferative phase: Rapid regeneration of myometrium and maturation of Graafian follicle.
2. Development of corpus luteum: Secretory phase and increased secretion of progesterone.
3. Menstruation: Breakdown of myometrium and ovum not fertilised.
4. Ovulation: LH and FSH attain a peak level and sharp fall in the secretion of progesterone.

Correct answer: Development of corpus luteum: Secretory phase and increased secretion of progesterone.

Solution

After ovulation, the ruptured follicle becomes the corpus luteum, which secretes progesterone. Progesterone converts the endometrium into the secretory phase, preparing it for implantation.

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