When does the process of extruding the polar | vedclass

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(A) In humans,the secondary oocyte remains arrested at the metaphase-$II$ stage of meiosis-$II$. The process of meiosis-$II$ is completed only when a

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After the entry of the sperm and before the completion of fertilization

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(A) In humans,the secondary oocyte remains arrested at the metaphase-$II$ stage of meiosis-$II$. The process of meiosis-$II$ is completed only when a sperm enters the secondary oocyte. Upon the entry of the sperm,the secondary oocyte undergoes the second meiotic division,which is unequal and results in the formation of a large haploid ovum (ootid) and a tiny second polar body. Therefore,the extrusion of the second polar body occurs after the entry of the sperm but before the fusion of the male and female pronuclei (completion of fertilization).

When does the process of extruding the polar body from the nucleus of the oocyte occur?

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