[The value of echography in cases of threatened abortion in the first trimester of pregnancy (author's transl)].

Echographic examination brings to the screening and determination of the seriousness of a threatened abortion features of prime importance. These are such as to change greatly the management. They are concerned with: --on the one hand the morphology of the oocyte, --and on the other hand the recognition and evaluation objectively of the criteria of the viability of the embryo and the activity of its heart and its motility.