INS and polycystic ovary syndrome: For the PCOS group, Day 0 insulin levels were lower than Day 1 levels at 0 (p < 0.01), 15 (p < 0.01), 30 (p < 0.01), and 150 (p < 0.01) min; Day 0 insulin levels were lower than Day 7 levels at −30 (p = 0.01), 0 (p < 0.01), 15 (p < 0.01), and 30 (p < 0.01) min; and Day 1 insulin levels were lower than Day 7 levels at −30 min (p = 0.01).