Rôle du généticien dans le cadre du diagnostic prénatal. [Role of the geneticist in prenatal diagnosis].

International audienceMedical geneticists, assisted by genetic counselors, are one of the main actors of prenatal diagnostic centers. They are involved at all stages of pregnancy: when there is an upstream project and a specific parental history, during pregnancy in case of accidental discovery of anomalies in fetal ultrasound, but also after a medical termination of pregnancy to clarify the subsequent genetic counseling. If possible, genetic counseling should be done before conception, as a first step in accurate diagnosis is often necessary. The results of some sophisticated tests will be known only after several months