BRD2 and polycystic ovary syndrome: Among the 424 infertile women with PCOS, 30.9% (131/424) had a bLH/FSH < 1 (group A), 58.0% (246/424) had a bLH/FSH of 1–2.49 (group B), and 11.1% (47/424) had a bLH/FSH ≥ 2.5 (group C).