title: Age of menarche in urban Argentinian girls.
abstract: A cross-sectional study in La Plata city, Argentina, yielded a mean age of menarche in 6494 schoolgirls, of 12.53 +/- 0.05 years, standard deviation 1.22 years, obtained by probit analysis. These values show a relatively early age of menarche in Argentinian girls as compared to other populations.
mesh_terms: D000293:Adolescent; D000328:Adult; D001118:Argentina; D002648:Child; D005260:Female; D006801:Humans; D008572:Menarche; D012959:Socioeconomic Factors; D014505:Urban Population