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A young woman in her teens has about 300,000 eggs in her ovaries. By the time she is menopausal, none are left.

"Relax, couch potatoes - your sperm is safe" by Robert Winston, www.theguardian.com. February 6, 2013.
A young woman in her teens has about 300,000 eggs in her ovaries. By the time she is menopausal, none are left.