title: [1997 FIVNAT general balance].
abstract: In 1997, the French National Register on in vitro fertilization, FIVNAT, has collected information on 3,854 initiated cycles and 36,583 oocyte recoveries, from which 61.2% were conventional IVF cycles and 38.6% were ICSI. For conventional IVF, the percentage of infertilities of tubal origin was 49.7%, whereas 45% of the recoveries involved a male factor. The stimulation regimen involved a GnRH in 95% of the cases mostly with a long blockage period (82.6%) which was associated to the highest pregnancy rate. The mean number of transferred embryos significantly decreased to 2.50 +/- 0.95 per transfer. Only 9.2% of the transfers involved more than 3 embryos, and were associated to a relatively poor pregnancy rate, confirming that they were preferently realised in couples with poor chances of pregnancy. Finally, the pregnancy rate per recovery (20.5%) and per transfer (26.0%) remained at the same level as in 1996.
authors.affiliation: FIVNAT, Hôpital de Bicêtre, Le Kremlin Bicêtre.
authors.forename: A
authors.initials: A
authors.lastname: Bachelot
authors.forename: J L
authors.initials: JL
authors.lastname: Pouly
authors.forename: A
authors.initials: A
authors.lastname: Devecchi
authors.forename: A
authors.initials: A
authors.lastname: Quénard
authors.forename: J
authors.initials: J
authors.lastname: de Mouzon
mesh_terms: D000328:Adult; D005260:Female; D005307:Fertilization in Vitro / Q000706:statistics & numerical data*; D005602:France / Q000453:epidemiology; D006801:Humans; D007246:Infertility / Q000453:epidemiology; D008297:Male; D012042:Registries / Q000706:statistics & numerical data*