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Question
What is menstrual cycle? Describe it in brief.
Solution
The menstrual cycle is the reproductive cycle of all primates, which begins at youth (menarche).
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Human females menstruate once every 28 to 29 days. The menstrual cycle refers to the order of events that occur between each menstruation.
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In the middle of the menstrual cycle, one ovum is discharged (ovulation).
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The menstrual cycle begins with the break down of the uterus endometrium, which lasts 3–5 days. Blood vessels in liquid form leave the body, however this only happens when the ovum is not fertilized.
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It is followed by the follicular phase. During this phase, the main follicles develop into Graafian follicles. This leads to uterine regeneration, follicular growth, and the production of estrogen by the developing follicles.
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During the 14th day of the cycle, the LH and FSH levels peak, leading to Graafian follicle rupture and ovulation. This phase is known as the ovulatory phase.
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In the absence of fertilisation, the corpus luteum declines, resulting in endometrial break down and the beginning of a new cycle.
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RELATED QUESTIONS
Why is follicular phase in the menstrual cycle also referred as proliferative phase? Explain.
The Graafian follicle, after ovulation turns into a hormone producing issue called Corpus callosum.
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Menstrual cycle
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Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Menarche is the stoppage of menstruation.
Describe the structure of Graafian follicle.
Read the following passage and answer the question that follows:
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The life of corpus luteum is generally about ______ days in the absence of pregnancy
All occur during follicular phase of menstrual cycle, EXCEPT
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Mainly which type of hormones control the menstrual cycle in human beings?
A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.
| HORMONE A | HORMONE B | |
| Subject 1 | Shows a peak on the 14th Day of the menstrual cycle. | Falls down during the luteal phase. |
| Subject 2 | Shows a peak on the 14th Day of the menstrual cycle. | The level is maintained high in the luteal phase. |
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About which day in a normal human menstrual cycle does rapid secretion of LH (Popularly called LH Surge) normally occurs?
Describe hormonal control in various phases of the menstrual cycle.
Write a short note on Secretory Phase.
The onset of menstruation in women is called ______.
In the human menstrual cycle, the ovulation occurs around ______.
