[Technical and biological evolution of medically assisted procreation (MAP)].

Compared to IUI (to which one knows that an ovulation induction must not be associated and where 6 cycles must not be exceeded), in vitro fertilization has undergone an important evolution. It has now become ambulatory. Its evolution has been marked by the use of LH-RH agonists, the vaginal route for the echographic puncture and freezing of the embryos. The two progresses expected are: in the short term, the mastering of the retrograde catheterization of the tube, to enable the embryo replacement in sterilities of healthy tubes and, in middle term, a better assessment of the quality of the conceptus to carry out a selective embryo transfer and to reduce the rate of multiple pregnancies.