THE PROBABILITY OF A SUCCESSFUL TREATMENT OF INFERTILITY BY IN-VITRO FERTILIZATION

The objective of this study was to define several estimates of the suc cess rate of in-vitro fertilization and embryo transfer treatment in r elation to treatment outcome. The data were collected in a retrospecti ve study of 591 patients treated during 3 years in one Belgian univers ity hospital. Several models used for evaluating the treatment of infe rtility were fitted to the data (logistic model, binomial model, doubl e binomial model, exponential model, the Speirs model. The number of o ocytes retrieved and the proportion of fertilized oocytes at the first attempt can be used as prognostic factors. According to these factors , the success rate after five attempts varies from 28 to 88%.