There is a limited lifetime supply of primary oocytes, which are present at the birth of a baby girl.

Question

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The number of primary oocytes present in a female baby's ovaries is the maximum number of eggs she will ever have. As she goes through puberty and begins to menstruate, some of these primary oocytes will mature into secondary oocytes and be released during ovulation, but the remaining primary oocytes will gradually be depleted until menopause. Therefore, there is a limited lifetime supply of primary oocytes.

There Is a Limited Lifetime Supply of Primary Oocytes, Which