PubMed · 1998 · 10 citations · 0 references
Veterinary MedicineGynecologyObstetricsAssisted Reproductive TechnologiesIn Vitro FertilizationReproductive MedicineAssisted ReproductionAssisted Reproductive TechniquesEmbryo EvaluationFemale InfertilityFertilization TechniquesMale InfertilityAssisted Reproductive Technology ConceptionEmbryo Transfer Outcome AssessmentOocyte In Vitro FertilizationPregnancy Rate Assessment
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.