[How to research oligohydramnios?].

When an oligohydramnios has been clinically detected, the fetoplacental study has to find the cause of this syndrome: malformations, infectious or environmental anomalies, and to study the consequences of this syndrome in the fetus. A careful and complete study allows us to indicate some genic syndromes such as polycystic kidney disease, Meckel syndrome, familial renal tubular dysgenesis, Vacterl-Hydrocephaly sequence, or Fraser syndrome inducing the genetic counseling and a familial study. The other pathologies, such as maternal diseases, infections or sporadic malformations must be followed by cautious maternal care for subsequent pregnancies.