title: Gynaecomastia.
mesh_terms: D000728:Androgens / Q000378:metabolism; D003430:Cross-Sectional Studies; D004967:Estrogens / Q000378:metabolism; D006177:Gynecomastia / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D008297:Male; D011627:Puberty
chemical_list: D000728:Androgens; D004967:Estrogens