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During oogenesis in human, first maturation division starts _A_ and completes _B_. Select the correct set of 'A' and 'B' from the following.

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A-Before ovulation, B-After fertilisation

A-Before ovulation, B-After entry of sperm

A-Before birth, B-just prior to ovulation

A-after birth, B-Before menopause

answer is A.

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Detailed Solution

In humans, during oogenesis, first maturation division (meiosis I) starts before birth. The primary oocytes are arrested at prophase I at birth. It starts again during puberty and completes just prior to ovulation.

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