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Impending Ovulation This is an ovary shortly before an egg is released. The stigma can clearly be seen.

Why female fertility falls with age

... likely to have problems." Instead Duncan thinks that the ageing ovary, where eggs are matured in structures called ... that can be used to slow down the process of ovarian ageing, which may help individuals choosing to defer ... the blood, we can use them to indicate the rate of ovarian ageing, and give information to a woman about her prospects ...

Elephants

Does stress affect elephant fertility?

... births enabled the scientists to study the influence of ageing and stress on the animals' fertility. According to ... The factors that contribute to differences in reproductive ageing in long-lived species are becoming more and more ...