[Antenatal diagnosis of obstructive uropathies: state of the art].

The development of ultrasonography has allowed the antenatal diagnosis of various forms of obstructive uropathy. The diagnosis of urinary tract dilatation is now possible by the 15th week of pregnancy. More recently, the study of foetal urine biochemistry has defined the prognostic factors of the course of postnatal renal function. The authors define and limit the current indications for the various antenatal interventions on the basis of the combination of antenatal ultrasonography and foetal urine biochemistry.