Pathomorphological changes in an early spontaneous abortus with triploidy (69, XXX).

Triploid (69,XXX) spontaneous abortus with a gestational age of 14--15 weeks (anatomical age of the embryo was 6 weeks) was analyzed macro- and microscopically. There were hydatidiform swelling and cystic degeneration of the villi, without proliferatio of the trophoblast of cells, aplasia of one umbilical artery. The embryo had the following anomalies: cranial and caudal hypoplasia; aplasia of the facial structures (aprosopia), ocular vesicles, nasal stalk, extremity buds, somites, upper jaw, hyoid and pharyngeal arches, esophagus; trachea, Rathke's pouch and oropharyngeal cavity; encephalocele, focal anomalous rudiments of cartilage in the chordamesoderm, atresia of the stomodeal foramen and persistance of the lenticular placode.