Gynaecology & Obstetrics 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. 💡 Explanation Reduction in estradiol levels leads to all except ✓ Correct Answer: D. Increase in α2 receptor concentration.