FABP4 and polycystic ovary syndrome: Numerous studies have reported that serum FABP4 levels were higher in PCOS patients than in controls and are associated with clinical phenotypes, including body mass index (BMI) and homeostasis model assessment-insulin resistance (HOMA-IR) [55,56], Interestingly, changes in circulating FABP4 levels were also related to the therapeutic outcomes of PCOS.