Hirsutism Beyond PCOS: Genome-Wide Evidence for Genetic Factors

This study explores the genetic factors contributing to hirsutism beyond polycystic ovary syndrome (PCOS) through a genome-wide association study (GWAS) involving 4,834 cases and 352,966 controls. It identifies seven genetic loci linked to hirsutism, with four being novel discoveries, and highlights a significant missense variant near the FGF5 gene, particularly in the Finnish population. The research suggests both androgen-dependent and independent mechanisms contribute to hirsutism, with shared genetic architecture between hirsutism, PCOS, and metabolic traits like obesity and type 2 diabetes. Despite limitations such as a lack of diverse ancestry representation, the study underscores the complex genetic underpinnings of hirsutism and its overlap with other metabolic and endocrine conditions.