[Prenatal diagnosis of triploidy. I. Echographic, clinical and anatomic studies].

Three cases of triploidy have been diagnosed prenatally on ultrasonography and clinical features. A morphological and histological study of both foetus and placenta is made. The cases and a review of live-born triploid infants published in the literature allow a description of some characteristic malformations. Possibilities of triploïd pregnancy recognition are discussed.