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Question

Which one of the following events is correctly matched with the time period in a normal menstrual cycle?

A
Release of egg – 5th day
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B
Endometrium regenerates – 5 - 14 days
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C
Endometrium secretes nutrients for implantation – 11-18 days
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D
Rise in progesterone level – 1 - 15 days
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Solution

The correct option is B Endometrium regenerates – 5 - 14 days

In human females, menstruation is repeated at an average interval of about 28/29 days, and the cycle of events starting from one menstruation till the next one is called the menstrual cycle. One ovum is released (ovulation) during the middle of each menstrual cycle. The cycle starts with the menstrual phase, when menstrual flow occurs and it lasts for 3-5 days. The menstrual phase is followed by the follicular phase. During this phase, the primary follicles in the ovary grow to become a fully mature Graafian follicle and simultaneously the endometrium of uterus regenerates through proliferation. The growth of superficial and middle layer of endometrium occurs from the 5th to 14th day of the cycle under the influence of estrogen.


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