Variations in pattern of pubertal changes in girls.
D000293:Adolescent; D000367:Age Factors; D000886:Anthropometry; D001940:Breast / Q000254:growth & development; D002648:Child; D005260:Female; D006197:Hair / Q000254:growth & development; D006801:Humans; D008598:Menstruation; D011627:Puberty; D012923:Social Class; D012959:Socioeconomic Factors; D013223:Statistics as Topic; D013997:Time Factors; D006113:United Kingdom