BRD2 and polycystic ovary syndrome: In a study investigating different isotypes of anti-FSH antibodies in women with PCOS, a logistic regression analysis, adjusted for age, revealed that anti-FSH immunoglobulin A (IgA) antibodies were identified as significant risk factors for PCOS (adjusted odds ratio [OR] 2.15; p = 0.015) and endometriosis (adjusted OR 2.00; p = 0.002).