Bovine luteal blood flow: basic mechanism and clinical relevance.

摘要: The introduction of transrectal colour Doppler sonography (CDS) has allowed the evaluation luteal blood flow (LBF) in cows. Because appropriate angiogenesis plays a decisive role functioning corpus luteum (CL), studies on LBF may provide valuable information about physiology and pathophysiology CL. Studies cyclic cows have shown that progesterone concentrations plasma can be more reliably predicted by than size (LS), especially during regression phase In contrast with non-pregnant cows, significant increase is seen pregnant third week after insemination. However, because there are high interindividual variations between animals, not useful for early diagnosis pregnancy. Determination sensitive LS detecting effects acute systemic inflammation exogenous hormones Cows low levels smaller CL mid-luteal phase, but related to did differ levels. conclusion, determined CDS provides additional function compared concentrations, its concerning fertility cow yet clarified.