Age-related Reproductive Hormonal Changes:

Decrease in: Increase in:

Mean serum testosterone aromatization

Clearance/production of testosterone FSH concentration
Androstenedione/DHEA estrogens
Bioactive LH
Mean LH response to GnRH
LH amplitude and/or frequency (altered pulse generation)
Inhibin concentration

-Normal or slight increase in sex hormone binding globulin

-Normal or slightly increased LH concentration

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