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Menstrual Cycle and Role of LH, FSH

In menstural ...

Question

In menstural cycle , why low concentration of estrogen provides negative feedback to the LH hormone and hiigh concentration of estrogen provides positive feedback to LH??

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Q. High concentration of LH and estrogen lead to:

Q. What is the source of increase in concentration of estrogen in the proliferative phase of menstrual cycle?

Q. When declining levels of estrogens and progesterone stimulate secretion of GnRH, is this a positive or negative feedback effect and why?

Q. High secretions of Atriggers ovulation in B day of the menstrual cycle. What are A and B?

AB
LH

7^{t h}

2^{n d}

14^{t h}

20^{t h}

Q. State whether the following statements are true or false .
High levels of progesterone result in a diminution of the trophic hormone LH. This is called negative feedback.

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Menstrual Cycle and Role of LH, FSH

Standard XII Biology

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