If mammalian ovum fails to get fertilized, which one of the following is unlikely:

Estrogen secretion further decreases

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Progesterone secretion rapidly declines

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Corpus luteum will disintegrate

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Primary follicle starts developing

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Solution

The correct option is A
Estrogen secretion further decreases

If the mammalian ovum fails to fertilise - Corpus leuteum declines so progesterone also decreases rapidly (progesterone is essential for maintenance of pregnancy). Also, estrogen continues to cause the growth of the endometrium which ultimately becomes thick enough to break down and cause menstruation. Hence estrogen secretion does not increase further. Primary follicles continue developing irrespective of ovulatory condition.

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Similar questions

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?

Q. If mammalian ovum fails to get fertilized, which one of the following is unlikely -

Q. If mammalian ovum fails to get fertilized, which one of the following is unlikely to happen?

Q. If mammalian ovum fails to get fertilized, which one of the following is unlikely in this cycle?

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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