[Does echography resolve the problem of diagnosis of extrauterine pregnancy at its onset?].

Incipient ectopic pregnancy is always difficult to diagnose. Hormonal assays confirm pregnancy, but in "high tubal risk" women the site of ovular implantation must be determined as early as possible and this, in theory, can be done by ultrasound examination. However pseudogestational images resembling incipient ectopic pregnancy may be misleading, and in the tubal context ultrasound scans must be interpreted with caution before embryonic echoes can be identified in the amniotic cavity.