Engel, E [Mental retardation: genetic counseling and prenatal diagnosis]. [electronic resource] - Revue medicale de la Suisse romande May 1981 - 341-6 p. digital Publication Type: Journal Article ISSN: 0035-3655 Subjects--Topical Terms: AdultChromosome Aberrations--diagnosisChromosome DisordersFemaleGenetic CounselingHumansIntellectual Disability--diagnosisMaternal AgePregnancyPrenatal Diagnosis