Histological changes in placenta villi in some types of pathological pregnancy.

: The examinations were carried out on 3 placentas from normal pregnancies and 12 placentas from pathological pregnancies (gestosis, cholestasis, type A diabetes pregnancies and premature outflow of amniotic fluids). Placenta sections were fixed in glutaraldehyde and subsequently embedded in Epon 812. Semithin sections 1 mu thick were stained with methylene blue and azure. Moreover, changes in terminal villi were assessed. In comparison with the control placentas changes in blood vessels, stroma and syncytiotrophoblast were found.