If mammalian ovum fails to get fertilised, which one of the following is unlikely?
A
Corpus luteum will disintegrate
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B
Oestrogen secretion further decreases
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C
Primary follicle starts developing
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D
Progesterone secretion rapidly declines
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Solution
The correct option is D Progesterone secretion rapidly declines If mammalian ovum fails to get fertilised the corpus luteum degenerate. This causes disintegration of endometrium leading to menstruation and a new cycle starts. Progesterone secretion declines and the primary follicle starts to develop again.