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It is recognized that in cattle there are two physiological, yet morphologically different, forms of corpora lutea (CL): homogeneous ones and those with a cavity. Because of its resemblance to a luteal cyst, a corpus luteum with a cavity may be a significant diagnostic problem. In this article, the author aims to present essential historical and current knowledge of this form of the corpus luteum,...
Contemporary methods used in early pregnancy diagnosis (ePD) in cows have been presented. Despite many new diagnostic tests, the choice methods still remain per rectum palpation and ultrasound examinations (US). The clinical examination is performed about 35 days post insemination, US at about 28 days. When compared to per rectum examination, early ultrasound pregnancy diagnosis (eUSPD) in cows enables...
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