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प्रश्न
Explain the menstrual phase in a human female. State the levels of ovarian and pituitary hormones during this phase.
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उत्तर
(a) The menstrual cycle is the reproductive cycle in all primates and begins at puberty (menarche).
- Menses takes place on the 3rd–5th day of the menstrual cycle of 28 days.
- The production of LH is considerably reduced.
- This causes degeneration of the corpus luteum and reduction in the production of progesterone and oestrogen.
- The uterine endometrium breaks down and menstruation starts.
- Cells of the endometrium, secretions, blood and the unfertilised ovum constitute menstrual flow.
During this phase, the levels of ovarian and pituitary hormones are low.
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संबंधित प्रश्न
Why is follicular phase in the menstrual cycle also referred as proliferative phase? Explain.
Give a significant point of difference between the oestrous and menstrual cycles.
Draw a neat and well-labeled diagram showing T.S. of the ovary and describe the menstrual cycle in human females.
Meanrch, menstrual cycle, and menopause are controlled by ______.
Explain the importance of cleanliness during the time of menstrual cycle in girls.
Progesterone peaks during which phase of the menstrual cycle?
Immediately after ovulation, the mammalian egg is covered by a membrane known as ______.
Which set is similar?
Menstruation normally occurs once in ______.
The secretory phase in the human menstrual cycle is also called:
