title: The decline in the age of menarche in the United States: should we be concerned?
authors.forename: Marcia E
authors.initials: ME
authors.lastname: Herman-Giddens
mesh_terms: D000293:Adolescent; D017677:Age Distribution; D002648:Child; D034462:Dissent and Disputes; D004777:Environment; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008572:Menarche; D009749:Nutrition Surveys; D044469:Racial Groups / Q000706:statistics & numerical data; D014481:United States / Q000453:epidemiology