You are completing a summer scholarship in a research laboratory that is looking at developing a new type of contraceptive in people with ovaries. Unfortunately, the previous summer scholarship student wasn’t as competent as you and accidentally mixed up the histological slides of an ovary from a 6-year-old girl and a 25-year-old woman. The lead researcher has asked you to separate and correctly label the slides. Thinking about folliculogenesis throughout the lifetime of a person with ovaries, what microscopic feature(s) (other than size) can you use to distinguish the ovaries of a 6-year-old girl and a 25-year-old woman and why?

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