In human females,at the time of birth,there a | vedclass

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(A) In human females,the process of oogenesis begins during embryonic development. By the time of birth,the ovaries contain approximately $2$ million

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$500$

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(A) In human females,the process of oogenesis begins during embryonic development. By the time of birth,the ovaries contain approximately $2$ million primary oocytes. However,many of these undergo degeneration during childhood and adolescence,a process known as follicular atresia. From puberty until menopause,only one ovum is typically released per menstrual cycle. Given that the reproductive span is approximately $35$ to $40$ years (from age $12-13$ to $50$),the total number of ova released is roughly $12$ cycles per year $	imes$ $40$ years $\approx$ $480$ to $500$ ova. Therefore,approximately $500$ ova reach maturity during the normal reproductive life of a human female.

In human females,at the time of birth,there are approximately $2$ million primary oocytes. How many of them normally reach maturity during the entire reproductive life of a female?

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