title: The age at menarche in some populations of the Veneto, North Italy.
abstract: The mean age at menarche in 6252 girls from secondary schools in six areas of the Veneto (Northern Italy) in 1975-1976, was estimated by probit analysis as 12-77 +/- 0-038 years. This mean is the highest known for Italy. Sexual maturation appears late in girls from large families and early in girls from small families: mean menarcheal ages were respectively 12-81 +/- 0-057 and 12-64 +/- 0-036 years.
mesh_terms: D000367:Age Factors; D002648:Child; D005191:Family Characteristics; D005260:Female; D006801:Humans; D007558:Italy; D008572:Menarche; D012959:Socioeconomic Factors