Production rates and metabolic clearance rates of human follicle—stimulating hormone in premenopausal and postmenopausal women

AUTOR(ES)

Coble, Yank D.

RESUMO

The production rates (PR) and the metabolic clearance rates (MCR) of human follicle—stimulating hormone (HFSH) were determined in six pre- and five postmenopausal women. Human FSH (PER-780) labeled with 131I to specific activities of 50-150 μc/μg was used as a tracer. Both double antibody and trichloroacetic acid (TCA) precipitation techniques were used to determine HFSH-131I levels in infusate and plasma. In four of the subjects MCRs measured by both constant infusion and single injection techniques were the same. By constant infusion, plasma HFSH-131I levels reached equilibrium between 4-5 hr.

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