[Comparative morphology of corpus luteum in uterine and tubal pregnancy].

Morphological examinations of a resected yellow body of the ovary in women with uterine (13 observations) and fallopian (74) pregnancies were carried out. In the uterine pregnancy, solid or cystic organization of the yellow body central zone, formation of thecavascular trabeculae and hypertrophy of luteinocytes were found in the presence of a well-developed microcirculatory bed. In fallopian pregnancy, 40 observations presented hypoplastic changes manifested by an incomplete structure-formation process, disturbed vascularization and differentiation of cell layers, immaturity of lutein cells Abortion of the ectopic pregnancy was accompanied by the reduction of the capillary network, arteriolar spasm and dystrophic changes in the parenchymatous layer. The primary structural-functional deficiency of the yellow body of the ovary was found to be possibly one of the main causes of fallopian pregnancy.