Hirsutism is the excessive hair growth in women in male-typical areas, usually associated with androgen excess and other conditions such as polycystic ovary syndrome (PCOS). The genetic basis of hirsutism remains poorly understood; researchers from the University of Oulu and collaborators performed a meta-analysis of genome-wide association studies from 4,834 cases of hirsutism and 352,966 controls across three cohorts.