FGFR1 and polycystic ovary syndrome: When the cohorts were stratified for BMI ≤ 29.9 kg/m2 and normal HOMA-IR (≤1.9), FGFR1, VEGF-D, IGF1, and IGF-1sR differed, suggesting that these factors are more likely to be inherently different in PCOS rather than an epiphenomenon of an associated PCOS feature such as BMI or IR.