title: Secular trend in age at menarche in Marrakesh (Morocco).
abstract: The median age at menarche observed by status-quo methods in 1991, and calculated by mean of probit analysis in a sample of 239 school girls from Marrakesh aged 11-17 years, was 13.75 +/- 0.17 years. Compared with earlier observations obtained for Moroccan girls in 1982 and 1987 the results show a decline of age at menarche of 0.55 year in the period 1982-91 and 0.25 year in the period 1987-91.
authors.affiliation: Laboratoire d'Ecologie Humaine, Marrakesh, Morocco.
authors.forename: M
authors.initials: M
authors.lastname: Loukid
authors.forename: A
authors.initials: A
authors.lastname: Baali
authors.forename: M K
authors.initials: MK
authors.lastname: Hilali
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D005260:Female; D006304:Health Status; D006801:Humans; D016013:Likelihood Functions; D008572:Menarche / Q000502:physiology*; D009018:Morocco; D009749:Nutrition Surveys; D012016:Reference Values; D012959:Socioeconomic Factors; D014504:Urban Health