title: Sensitivity and specificity of ultrasound indices of ovulation in spontaneous cycles.
abstract: OBJECTIVE
  Evaluation of sensitivity and specificity of 4 ultrasound indices of ovulation.
  
  
  METHODS
  Multicenter collaborative study of 794 abdominal and transvaginal ultrasound scanning of ovaries performed during 271 cycles in 107 normally fertile women. Comparison of sensitivities and specificities of indices using McNemar test.
  
  
  RESULTS
  The sensitivity and specificity of the indices were 84 and 89.2, respectively, for disappearance or sudden decrease in follicle size; 38.4 and 79.7 for appearance of ultrasonic echoes in the follicle; 61.6 and 87.1 for irregularity of follicular walls; 71.0 and 88.2 for appearance of free fluid in the cul-de-sac of Douglas.
  
  
  CONCLUSIONS
  Ultrasonic echoes had a significantly lower sensitivity (P<0.001) and specificity (P<0.01) than other indices.
authors.affiliation: Unité de Biostatistiques, Département d'Information Médicale, Hospices Civils de, Lyon, France. Rene.ecochard@chu-lyon.fr
authors.forename: R
authors.initials: R
authors.lastname: Ecochard
authors.forename: H
authors.initials: H
authors.lastname: Marret
authors.forename: M
authors.initials: M
authors.lastname: Rabilloud
authors.forename: R
authors.initials: R
authors.lastname: Bradaï
authors.forename: H
authors.initials: H
authors.lastname: Boehringer
authors.forename: S
authors.initials: S
authors.lastname: Girotto
authors.forename: M
authors.initials: M
authors.lastname: Barbato
mesh_terms: D000328:Adult; D004970:Estrone / Q000031:analogs & derivatives / Q000652:urine; D005260:Female; D006801:Humans; D008597:Menstrual Cycle; D008875:Middle Aged; D006080:Ovarian Follicle / Q000000981:diagnostic imaging*; D010053:Ovary / Q000000981:diagnostic imaging; D010061:Ovulation Detection / Q000379:methods*; D011276:Pregnanediol / Q000031:analogs & derivatives / Q000652:urine; D012680:Sensitivity and Specificity; D014463:Ultrasonography
chemical_list: C022270:pregnanediol-3 alpha-glucuronide; C015856:estrone-3-glucuronide; D004970:Estrone; D011276:Pregnanediol