[Evaluation of the usefulness of histological studies of the uterus of cows for confirmation of past pregnancies].

The material for studies were uteri of heifers, primiparous and multiparous cows taken directly after slaughter. From the excised uterus segments (uterus corni) histological preparations stained with hematoxylin and eosin were made. The studies did not show any observable differences in the histological structure of the uteri of heifers and primiparous cows. However, such differences were found in multiparous cows. They were found in the structure of the vascular layer, which distinctly separated the orbicular layer from the oblong muscular coat in multiparous cows. In heifers and primiparous cows the vascular layer was formed by single agglomerations of blood vessels distributed in the muscular layer of the uterus.