title: Age at menarche and risk of abortion: further evidence.
abstract: OBJECTIVE
  To study the relationship between the age of menarche and risk of abortion.
  
  
  METHODS
  Correspondence analysis and application of life table survival analysis were used to study the association between the age at menarche and the outcome of pregnancy on data collected from 329 women.
  
  
  RESULTS
  Both analyses showed increased risk of abortion with increasing age of menarche. Risk of abortion associated with early age at menarche (9-11 years) was 1.2% and it increased to 66.7% when the menarche age was 15 years or above.
  
  
  CONCLUSIONS
  Early age at menarche is associated with lower risk of abortion.
authors.affiliation: Department of Obstetrics and Gynecology, King Khaled University Hospital, Riyadh, Saudi Arabia.
authors.forename: Z A
authors.initials: ZA
authors.lastname: Babay
mesh_terms: D000028:Abortion, Induced / Q000706:statistics & numerical data*; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D005260:Female; D006801:Humans; D008572:Menarche; D011247:Pregnancy; D012307:Risk Factors; D012529:Saudi Arabia / Q000453:epidemiology