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The objective of this study was to examine whether an oxytocin challenge test (OCT), evaluated by measuring the changes in uterine blood flow using transrectal colour Doppler ultrasonography, is a suitable non-invasive method to determine uterine contractility in puerperal dairy cows. The changes in uterine blood flow during uterine contractions induced by oxytocin were evaluated on days 2 and 5 postpartum...
Transrectal real-time ultrasonography (US) has been developed as a research and practical tool in bovine reproduction. Non-invasive US observations have made it possible to provide real-time and serial analyses of ovarian morphological changes and fetal development and have generated new information on reproductive physiology during the bovine oestrous cycle and pregnancy. This has greatly contributed...
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