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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
Give a significant point of difference between the oestrous and menstrual cycles.
Define Amenorrhea
During which phase of the menstrual cycle does the endometrium thicken up to 8-10 mm?
The life of corpus luteum is generally about ______ days in the absence of pregnancy
Identify the INCORRECT statement.
A human female reaches menopause aroung the age of ______.
Define ovulation.
The secretory phase in the human menstrual cycle is also called:
The growth of corpus luteum is initiated by:
The onset of menstruation in a human female is called ______.
