title: A study of the menstrual patterns of adolescents in Ile-Ife, Nigeria.
abstract: Questionnaires and interviews with 768 female students in residence at the Obafemi Awolowo University, Ile-Ife, Nigeria revealed that the mean and median ages of menarche were respectively 13.4 +/- 1.4 and 13.5 years and 80.8% had menstrual cycles between 25 and 35 days. The duration of menstrual bleeding was 4.5 +/- 0.8 days; 72.3% had dysmenorrhea and 17.8% complained of nausea and vomiting during menstruation.
authors.affiliation: Department of Chemical Pathology, Obafemi Awolowo University, Nigeria.
authors.forename: K D
authors.initials: KD
authors.lastname: Thomas
authors.forename: F E
authors.initials: FE
authors.lastname: Okonofua
authors.forename: O
authors.initials: O
authors.lastname: Chiboka
mesh_terms: D000293:Adolescent; D004412:Dysmenorrhea / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008572:Menarche; D008598:Menstruation; D009549:Nigeria / Q000453:epidemiology