title: Oral contraceptive use by teenage women does not affect peak bone mass: a longitudinal study.
abstract: OBJECTIVE
  To determine the effect of oral contraceptive pill (OCP) use during adolescence on peak bone mass.
  
  
  METHODS
  Longitudinal observational study.
  
  
  METHODS
  Academic clinical research center.
  
  
  METHODS
  Sixty-two non-Hispanic, white females in The Penn State Young Women's Health Study, who were studied for 8 years during ages 12-20.
  
  
  METHODS
  There were 28 OCP users, who used OCPs for a minimum of 6 months and were still using at age 20, and 34 nonusers who had never used OCPs.
  
  
  METHODS
  Total body bone, dedicated hip bone, and body composition measurements were made by dual-energy roentgenogram absorptiometry.
  
  
  RESULTS
  The OCP users and nonusers did not differ at entry in anthropometric, body composition, or total body bone measurements. By age 20, the average duration of OCP use by the user group was 22 months. At age 20, the groups remained indistinguishable in anthropometric, body composition, total body, and hip bone measures, and in age of menarche and sports exercise scores.
  
  
  CONCLUSIONS
  Oral contraceptive pill use by healthy, white, teenage females does not affect acquisition of peak bone mass.
authors.affiliation: Department of Health Evaluation Sciences, Penn State College of Medicine, Hershey, Pennsylvania 17033, USA. tal3@psu.edu
authors.forename: T
authors.initials: T
authors.lastname: Lloyd
authors.forename: D S
authors.initials: DS
authors.lastname: Taylor
authors.forename: H M
authors.initials: HM
authors.lastname: Lin
authors.forename: A E
authors.initials: AE
authors.lastname: Matthews
authors.forename: D F
authors.initials: DF
authors.lastname: Eggli
authors.forename: R S
authors.initials: RS
authors.lastname: Legro
mesh_terms: D000293:Adolescent; D000328:Adult; D001823:Body Composition; D015519:Bone Density / Q000187:drug effects*; D002648:Child; D003278:Contraceptives, Oral, Hormonal / Q000009:adverse effects*; D015444:Exercise; D005260:Female; D006801:Humans; D008137:Longitudinal Studies
chemical_list: D003278:Contraceptives, Oral, Hormonal