title: [Vascular lesions of the endometrium in spontaneous abortion].
abstract: On the basis of a histological study of vascular lesions of the endometrium following 108 cases of spontaneous abortion, the authors propose the following conclusions: 1) In the first six weeks of pregnancy, early abortion results more often from a primary ovular defect than from any abnormality in the maternal environment, of endogenous or exogenous origin and capable of resulting in a lesion of the endometrium or its vascularisation. The structure of the walls of the spiral arteries of pregnancy is almost invariably normal. 2) By contrast, in late abortions, arterial lesions--and in particular fibrosis--may play a role. This occurs however when the basal arteries with a well-differentiated elastic structure are involved. The spiral arteries of pregnancy and the utero-placentar arteries are involved only by lesions of vasculitis secondary to inflammatory phenomena as  a result of retention of the products of conception or by pseudo-atheromatous lesions resulting from the deposition of degenerated cyto-trophoblastic elements, but never from true arteriosclerotic lesions.
mesh_terms: D000022:Abortion, Spontaneous / Q000473:pathology*; D001158:Arteries / Q000473:pathology*; D001161:Arteriosclerosis / Q000473:pathology; D001706:Biopsy; D004717:Endometrium / Q000098:blood supply*; D005260:Female; D006801:Humans; D011247:Pregnancy; D013997:Time Factors
vernacular_title: Les lésions vasculaires de ĺendomètre dans ĺ avortement spontané