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Ovaries

In menstrual ...

Question

In menstrual cycle one ovum is released from either ovaries and the remaining graffian follicle converts into corpus luteum which will secret progesterone for only 7 days but if pregnancy occurs then it secret progesterone for 3 months , in this scenario how the corpus luteum will secret RELAXIN at the parturition at 9 month if it is already died and replaced by placenta?

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Solution

Actually it is not corpus luteum that produces relaxin during parturition.
Relaxin is a hormone secreted by the placenta that causes the cervix to dilate and prepares the uterus for the action of oxytocin during labour.

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Q. During a menstrual cycle and secreted by the corpus luteum prepare the uterus for pregnancy.

Q. Secretion of progesterone by corpus luteum is initiated by:

Secretion of progesterone by Corpus luteum is initiated by _____.

Q. Assertion :Corpus luteum is produced by Graafian follicle after ovulation. Reason: It secretes estrogen which is necessary to maintain pregnancy.

Q. Refer to the given schematic representation of menstrual cycle showing three phases I, II and Ill.

Select the option that correctly matches these phases with the following events.

(i) FSH secreted by the anterior pituitary stimulates the ovarian follicle to secrete estrogen which stimulates the proliferation of the endometrium.

(ii) LH secreted by the anterior pituitary stimulates the development of corpus luteum which secretes progesterone.

(iii) Reduced production of LH from anterior pituitary causes degeneration of corpus luteum, thereby progesterone production is reduced.

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