[Oligo-amnios].
The amniotic fluid shares closely in the well-being of the future child and volume abnormalities represent a valuable factor in the screening of fetal pathology. Many publications have recently reminded of the importance of oligo-amnios as a prognosis factor in prenatal monitoring. Through an incomplete review of the literature, the author reminds of the physiology of amniotic fluid, diagnosis methods of oligo-amnios (essentially sonography), its causes and consequences, and finally its practical use as a monitoring parameter. A few possibilities of treatment are also discussed.