[Morphology of the placenta and quality of the metabolic control during pregnancy in diabetes mellitus].

The quality of metabolic control during diabetic pregnancy and the severity of morphological alterations of the placenta are statistically correlated independent of White's classification. In cases of inadequate metabolic control typical diabetic maturation disturbances of the placenta are to be seen more often and more severe. But there are also severe maturation disturbances of the placenta in well controlled diabetics with normoglycaemic blood glucose levels during last months of pregnancy. In such cases the metabolic regulation in earlier periods of pregnancy was mostly insufficient. On the other hand unimportant maturation disturbances of the placenta in some badly controlled diabetics were seen. Such pregnancies were mostly complicated by toxaemia.