varying between an AFC under 3 and under 12, largely resulting from various definitions of the size follicles to be called antral ones.

The following table defines antral follicles as those about 2-8 mm in diameter:

The incidence of poor ovarian response in IVF ranges from 10 to 20%. Older poor responders have a lower range of pregnancy rates compared with younger ones (1.5-12.7 versus 13.0-35%, respectively). Also, the other way around, there is a lower prevalence of poor responders among young women compared to those of

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