Abstract:Endogenous sex hormone concentrations vary across the menstrual cycle of naturally menstruating premenopausal women and may elicit concomitant changes in vascular function. Specifically, estrogen (E2) may enhance vascular function, partially by increasing nitric oxide bioavailability. In contrast, the influence of progesterone (P4) on vascular function remains unclear, with some data suggesting it increases nitric oxide bioavailability and other data suggesting it antagonizes the dilatory effects of E2. The ob… Show more
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