title: [Knowledge of contraception, pregnancy, and sexuality in ninth grade pupils in the municipality of Viborg during a 21-year-period].
abstract: BACKGROUND
  A study of the sources of and the changes in the knowledge about contraception, pregnancy, and sexuality during a 21-year-period.
  
  
  METHODS
  A questionnaire was handed out on the same day in all ninth grade classes in the Municipality of Viborg without prior notice to teachers or pupils. The results were compared with similar studies performed in 1986, 1993, and 2000.
  
  
  RESULTS
  In all 394 of 398 questionnaires were answered. The answers revealed that forty-three percent knew at which time in the cycle pregnancy can occur; boys with sexual debut scored lowest. The time limits for legal abortion were known by 64%, the girls had a higher level of knowledge on this item than the boys. The abortion limits for 16-year-old girls were known by 58%, but here the boys, who had made sexual debut, scored highest and the girls with no prior sexual experience scored lowest. The sources of knowledge changed over the years; screen-based media (TV, internet) now cover more than 30% of both gender's sources, and magazines/pornography comprise more than 50% of girls' and 30% of boys' sources of knowledge. The school's and friends' share in sexual education remained constant, while books and parents as knowledge sources show a downward trend.
  
  
  CONCLUSIONS
  School and friends still play a substantial role in the sexual education of ninth grade pupils, but screen-based media and magazines are now the third-most important source of information and their importance have increased considerably over the past seven years. Knowledge of time limits for abortion, early pregnancy signs and cycle has not changed except for slight gender differences.
authors.affiliation: Gynaekologisk Afdeling, Regionshospitalet Herning, DK-7400 Herning. affl@ringamt.dk
authors.forename: Jacob Lauesgaard
authors.initials: JL
authors.lastname: Nielsen
authors.forename: Jane
authors.initials: J
authors.lastname: Boelskifte
authors.forename: Jørgen
authors.initials: J
authors.lastname: Falk
authors.forename: Finn Friis
authors.initials: FF
authors.lastname: Lauszus
authors.forename: Kjeld Leisgård
authors.initials: KL
authors.lastname: Rasmussen