Improvement in the prenatal etiologic diagnosis of severe 2d trimester oligo-amnios by intra-amniotic injection of physiologic solution

In reference to 4 severe cases of oligo-amnios of the second trimester of pregnancy, the authors advocate a method in order to improve the pre-natal diagnosis by intra-amniotic injection of a normal saline solution. This method facilitates the morphological exploration of the fetus by sonogram and enables to obtain a fetal karyotype by umbilical or amniotic tap. The potential risk of this technique are described.