GAPDH and polycystic ovary syndrome: The stability of traditional RGs such as GAPDH, ACTB, and/or 18S was moderate to low in testosterone-influenced hypothalamus and kidney of rats [27], hypothalamus of chicken under different feeding status [30], HPG axis in songbird [26], pituitary gland from normal/adenoma dogs and mice [28], and human polycystic ovarian syndrome [29].