Résumé : After discussing the main technical problems related to prenatal diagnosis the authors report on their results with 149 amniotic cell cultures. In 5 of them examination was requested for a suspected inborn error of metabolism. In 6 cases a risk of a severe X linked familial disease led to antenatal sex determination. In the great majority of the cases foetal caryotype was required. Four cases of trisomy 21 and one case of trisomy 13 were detected. All prenatal diagnoses could be confirmed in the foetus or the newborn.