[In vitro fertilization in women over the age of 40].

IVF practice is increasing for women aged over fourty, in France. Analysis shows that when women's age increases, stimulation protocols with GnRH analogues using a short blocking period or "classical" protocols (without GnRH) are more and more used. However, the highest pregnancy rates are still obtained for protocols using GnRH analogues with a long blocking period. The proportion of the stimulation regimen using pure FSH is also increasing, but pregnancy rates do not show any difference between these protocols and those using hMG.