title: Have the onset and tempo of puberty changed?
authors.forename: E O
authors.initials: EO
authors.lastname: Reiter
authors.forename: P A
authors.initials: PA
authors.lastname: Lee
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D005260:Female; D012739:Gonadal Steroid Hormones / Q000097:blood; D006306:Health Surveys; D006801:Humans; D008297:Male; D011627:Puberty / Q000502:physiology*; D012016:Reference Values; D012741:Sexual Maturation / Q000502:physiology*; D014481:United States
chemical_list: D012739:Gonadal Steroid Hormones