During the late reproductive years, what is the FSH level characteristic in stage -3b?

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Multiple Choice

During the late reproductive years, what is the FSH level characteristic in stage -3b?

Explanation:
FSH stays within the normal reference range in this stage because ovarian function is still sufficient to provide strong negative feedback to the pituitary. The ovaries are capable of producing enough inhibin B and estradiol to keep FSH suppressed, so even though aging is ongoing, the late reproductive years (stage -3b) still show normal FSH levels. Elevations in FSH tend to occur later, as ovarian reserve declines further and feedback weakens, which is not yet the case in this stage.

FSH stays within the normal reference range in this stage because ovarian function is still sufficient to provide strong negative feedback to the pituitary. The ovaries are capable of producing enough inhibin B and estradiol to keep FSH suppressed, so even though aging is ongoing, the late reproductive years (stage -3b) still show normal FSH levels. Elevations in FSH tend to occur later, as ovarian reserve declines further and feedback weakens, which is not yet the case in this stage.

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