The age at menarche in some populations of the Veneto, North Italy.
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.
D000367:Age Factors; D002648:Child; D005191:Family Characteristics; D005260:Female; D006801:Humans; D007558:Italy; D008572:Menarche; D012959:Socioeconomic Factors