Question

question 38
on average, how often are oocytes replaced in the ovaries?
once a month
every ovarian cycle
never
after each pregnancy

Explanation:

Oocytes are present at birth and are not replaced. A female is born with all the oocytes she will ever have. They are gradually used up over the course of her reproductive life - span through the ovarian cycles. There is no mechanism for replacing oocytes in the ovaries.

Answer:

never