title: Experience with transvaginal ultrasound-guided aspiration of supernumerary follicles for the prevention of multiple pregnancies after ovulation induction and intrauterine insemination.
abstract: OBJECTIVE
  To avoid multiple pregnancies caused by ovulation induction.
  
  
  METHODS
  Infertile couples treated in the Women's Hospital and the Institute of Reproductive Medicine of the University of Münster, Münster, Germany.
  
  
  METHODS
  The outcome of ovulation induction in patients in whom supernumerary ovarian follicles were aspirated transvaginally was compared with the outcome in patients in whom this intervention was not necessary. In a second randomized prospective study, the efficacy of a low dosage of gonadotropins was compared with a higher dosage.
  
  
  METHODS
  Two hundred twenty-seven couples suffering from male infertility, unexplained infertility, incipient ovarian failure, and polycystic ovaries.
  
  
  METHODS
  Aspirations were performed if more than three follicles were sized > 14 mm.
  
  
  METHODS
  Number of (multiple) pregnancies.
  
  
  RESULTS
  During 232 ovulation inductions, 127 aspirations of supernumerary follicles were performed (54.7%). The pregnancy rate (PR) in these cycles was similar to cycles in which aspirations were unnecessary (24.4% versus 21.9%). The efficacy of 75 units of FSH administered daily during the recruitment phase of follicular development was equivalent to 150 units of FSH (PR: 32.4% versus 31.6%), but supernumerary follicles were fewer (26.5% versus 76.3%). Six twins, two triplets (multiple PR: 10.4%), and no ovarian hyperstimulation syndrome occurred.
  
  
  CONCLUSIONS
  Transvaginal aspiration of supernumerary follicles does not reduce the PR in ovulation induction. Supernumerary follicles can be avoided by low-dose administration of gonadotropins without compromising the PR.
authors.affiliation: Women's Hospital, Münster, Germany.
authors.forename: C
authors.initials: C
authors.lastname: De Geyter
authors.forename: M
authors.initials: M
authors.lastname: De Geyter
authors.forename: E
authors.initials: E
authors.lastname: Castro
authors.forename: M
authors.initials: M
authors.lastname: Bals-Pratsch
authors.forename: E
authors.initials: E
authors.lastname: Nieschlag
authors.forename: H P
authors.initials: HP
authors.lastname: Schneider
mesh_terms: D005260:Female; D005640:Follicle Stimulating Hormone / Q000008:administration & dosage / Q000627:therapeutic use; D006801:Humans; D007246:Infertility / Q000628:therapy*; D007315:Insemination, Artificial; D008297:Male; D006080:Ovarian Follicle / Q000601:surgery*; D010062:Ovulation Induction; D011247:Pregnancy; D011256:Pregnancy Outcome; D011272:Pregnancy, Multiple; D011446:Prospective Studies; D013396:Suction / Q000379:methods*; D014463:Ultrasonography; D014621:Vagina / Q000000981:diagnostic imaging*
chemical_list: D005640:Follicle Stimulating Hormone