FRENCH IVF REGISTRY FIVNAT 1997 REPORT

In 1997, the French National Register on in vitro fertilization, FIVNA T, has collected information on 3,854 initiated cycles and 36,583 oocy te 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 ma le factor. The stimulation regimen involved a GnRH in 95 % of the case s mostly with a long blockage period (82.6 %) which was associated to the highest pregnancy rate. The mean number of transferred embryos sig nificantly decreased to 2.50 +/- 0.95 per transfer. Only 9.2 % of the transfers involved more than 3 embryos, and were associated to a relat ively poor pregnancy rate, confirming that they were preferently reali sed in couples with poor chances of pregnancy. Finally the pregnancy r ate per recovery (20.5 %) and per transfer (26.0 %) remained at the sa me level as in 1996.