PRL and polycystic ovary syndrome: TSH and prolactin levels were similar across all groups (TSH PCOS: 1.8 [1.2 - 2.9] μIU/mL, possible PCOS: 2.1 [1.3 - 4.5] μIU/mL, no PCOS: 2.0 [1.2 - 3.4] μIU/mL; prolactin: PCOS: 11.8 [7.5 - 16.7] ng/mL, possible PCOS: 11.7 [6.7 - 15.4] ng/mL, no PCOS: 11.7 [8.1 - 17.6] ng/mL).