Gynaecology & Obstetrics General ad6d0c37 Reduction in estradiol levels leads to all except A Increase in hypothalamic Norepinephrine. B Increase in hypothalamic serotonin. C Decrease in α2 receptor concentration. D Increase in α2 receptor concentration. High-Yield Explanation Reductions in estradiol levels lead to decline in inhibitory presynaptic α2 adrenergic receptor concentrations.