Question

How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?​

Answer 1

Typically in a month, human ovaries release only one egg, rarely two.

Incase of identical twins or monozygotic twins, one egg is released by the ovary which splits into two post-fertilization. This is why identical twins exhibit the same genetic features. On the other hand, in fraternal twins or dizygotic twins, two eggs are released which are fertilized by two different sperms causing the fraternal twins to exhibit different genetic characters.

Answer 2

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Only one egg is released by a human ovary in a month. Identical twins are produced a single egg by separation of early blastomeres resulting from first zygotic cleavage. If the twins born were fraternal, then twins would have developed from two separate eggs.

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