[The results of in-vitro fertilization in a Dutch multicenter study].

Part of a cost-effectiveness study on in-vitro fertilisation was the evaluation of the medical results of this fertility treatment. Data were prospectively collected from more than 3000 IVF treatments in the five Dutch hospitals during a two-year period. The average take-at-least-one-healthy-baby-home rate per started treatment was 10% (the average clinical pregnancy rate per embryo transfer was 20%). After several IVF treatments about one in three or four couples were successful. Ranges in results were mainly caused by patient characteristics, the individual treatment number and the treating hospital. Male subfertility and long-lasting and primary infertility result in a bad prognosis. Success rates differed substantially between hospitals, even after correction for patient mix.