Neuregulin-4 and Emerging Metabolic and Reproductive Biomarkers in Polycystic Ovary Syndrome: A Narrative Review.
ABSTRACT Polycystic ovary syndrome (PCOS) is a common and heterogeneous endocrine-metabolic disorder characterized by reproductive dysfunction and increased cardiometabolic risk. Conventional diagnostic criteria do not fully capture disease heterogeneity or long-term metabolic vulnerability. In recent years, multiple e...