title: The prediction of the chance to conceive in subfertile couples.
abstract: OBJECTIVE
  To develop a model that can predict the chance to conceive spontaneously in subfertile couples.
  
  
  METHODS
  In a cohort study, a consecutive series of patients consulting infertility was followed up. We related information from previous history, physical examination, postcoital tests (PCT), semen analyses, and sperm penetration meter tests with the occurrence of a spontaneous pregnancy.
  
  
  METHODS
  Fertility center in a university hospital.
  
  
  METHODS
  Nine hundred ninety-six couples consulting for infertility due to cervical hostility, male subfertility, or unexplained infertility.
  
  
  METHODS
  None.
  
  
  METHODS
  Time between intake and occurrence of the first spontaneous pregnancy.
  
  
  RESULTS
  Information from the previous history (duration of infertility, primary or secondary female infertility, age of the woman, fertility problems in male's family), the percentage motile sperm in the first semen analysis, and the result of the first PCT are sufficient to predict the chance to conceive. A pocket chart is presented for easy use of the model.
  
  
  CONCLUSIONS
  With a limited amount of diagnostic information, the chance to conceive spontaneously can be predicted.
authors.affiliation: Department of Public Health, Erasmus University Rotterdam, The Netherlands.
authors.forename: J M
authors.initials: JM
authors.lastname: Eimers
authors.forename: E R
authors.initials: ER
authors.lastname: te Velde
authors.forename: R
authors.initials: R
authors.lastname: Gerritse
authors.forename: E T
authors.initials: ET
authors.lastname: Vogelzang
authors.forename: C W
authors.initials: CW
authors.lastname: Looman
authors.forename: J D
authors.initials: JD
authors.lastname: Habbema
mesh_terms: D000328:Adult; D015331:Cohort Studies; D005260:Female; D005298:Fertility; D005306:Fertilization; D005500:Follow-Up Studies; D005544:Forecasting; D006801:Humans; D007246:Infertility / Q000175:diagnosis / Q000453:epidemiology / Q000503:physiopathology; D008297:Male; D008423:Maternal Age; D008499:Medical Records; D008954:Models, Biological; D011379:Prognosis; D012044:Regression Analysis; D013076:Sperm Count; D013081:Sperm Motility; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000166:cytology