Placenta-Insuffizienz

Hg, Bender

doi:10.1007/bf00668625

Cited by 13 publications

(3 citation statements)

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“…There is an increase of the Vv of the fetal capillaries, but the constant Sv means that in a volume unit of the labyrinth there are fewer fetal vessels which, however, have a larger diameter. An increase of the diameter of the fetal vessels allows better perfusion, and this is an adaptation which also occurs in the human placenta with infarcts [Bender, 1974], In control placentas the ratio of the Vv of the lacunae versus capillaries amount to 2.9:1. The ratio of the Sv is 1.2:1.…”

Section: Discussionmentioning

confidence: 99%

“…Diameter and volume density (Vv) of the fetal vessels in the villi increase, whereas the diameter of the villi decreases [Becker, 1963]. These changes can also be observed in heavily infarcted placentas [Bender, 1974] and in placentas of full-term pregnancies, but with small babies, so-call ed light-for-date neonates [Fabre González and Sánchez Ramos, 1975].…”

Section: Introductionmentioning

confidence: 98%

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Compensation Mechanisms for Experimental Reduction of the Functional Capacity in the Guinea Pig Placenta

Heijden¹

1981

Cells Tissues Organs

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After experimental reduction of its functional capacity, the placenta of the guinea pig has been studied microscopically for changes in the maternal and fetal vascularization pattern which could be interpreted as a compensation for this reduction. The functional capacity has been reduced in four ways. In the experimental groups the volume density of fetal capillaries in the labyrinthine part of the placenta was increased significantly compared with untreated controls. The surface density of these vessels, however, remained the same as in the control placentas. The volume density and surface density of the maternal lacunae did not change significantly. The conclusion is that after experimental reduction of its functional capacity the only structural modification in the guinea pig placenta involving the maternal and fetal vascularization, which can be interpreted as a compensation mechanism, is a widening of the fetal capillaries in the labyrinth.

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