End of the trend? A 12-year study of age at menarche.
A 12-year study of menarchial age in all girls entering the University College of Swansea (1959-70) suggests that the downward trend in age at menarche has ceased in Britain. The turning point appears to have occurred in girls born about 1946.
D000293:Adolescent; D000367:Age Factors; D002648:Child; D005191:Family Characteristics; D005260:Female; D006801:Humans; D008572:Menarche; D012923:Social Class; D006113:United Kingdom