[Variants of pathological immaturity of the placenta and their role in fetal development].
Morphologic evaluation of 125 placentas in various pregnancy and neonatal disturbances versus 46 normal placentas of different gestation provided the basis for recognition of 4 basic variants of the villous tree immaturity. Variant I is marked by embryonal villi close in structure to the villi of normal placentas (8-12 weeks gestation). Variant II presents intermediate immature and mature branches demonstrating the morphology of mean-caliber placental villi (13-28 weeks gestation). Variant III involves irregular sclerosed villi (23-24 weeks gestation). These variants are concerned with pathologic placental immaturity. There is also another variant which is confirmed by the evidence gained and can be related to a borderline condition between health and pathology--dissociated placentation. A favourable neonatal prognosis depends on a large amount of terminal special villi and compensatory placental angiomatosis.
A P
AP
Milovanov
O Iu
OIu
Zakharova
D000022:Abortion, Spontaneous / Q000473:pathology; D002824:Chorionic Villi / Q000473:pathology; D005314:Embryonic and Fetal Development; D005260:Female; D005313:Fetal Death / Q000473:pathology; D006801:Humans; D007752:Obstetric Labor, Premature / Q000473:pathology; D010920:Placenta / Q000473:pathology; D010922:Placenta Diseases / Q000473:pathology*; D010927:Placental Insufficiency / Q000473:pathology*; D011225:Pre-Eclampsia / Q000473:pathology; D011247:Pregnancy; D011272:Pregnancy, Multiple
Varianty patologicheskoĭ nezrelosti platsenty i ikh rol' v razvitii ploda.