【摘要】 本试验采用SCD-Ⅱ型兽用超声多普勒检测仪对483头乳牛进行了早期怀孕诊断,并与直肠检查法相比较,其符合率高。最早检出宫血音、胎心音、胎血音的时间分别为16天、50天、59天。宫血音诊断与直肠检查诊断的符合率在配种后16-30天、31-50天分别为92.93%(184/198)、97.91%(141/144),在配种后51-79天及未怀孕的母牛均为100%(116/116及36/36)。胎血音在配种后59-65天、70-85天的符合率分别为48.15%(13/27)、90.35%(25/27)。试验证明,检测到宫血音的时间比胎心音、胎血音早30-40天左右,与直肠检查结果相比较其符合率也较高。因此,乳牛的早期怀孕诊断可用宫血音作为判定怀孕的主要依据。更多还原

【Abstract】 483 milk cows during the early stage of pregnancy were examined with Doppler SCD-Ⅱ type veterinary supersonic detector. The result was highly coincident with that of the rectum examination. Detecting the sound of uterine blood flow, fetal heart beats and the sound of fetal blood flow at the earliest stage of pregnancy was 16th, 50th and 59th day after breeding, respectively. The coincidence rates of detection of uterine blood flow sound with diagnosis of rectal palpation during 16-30 and 31-50 days after breeding were 92.93% (184/198), 97.91%(141/144) respectively, 100%(116/116) and 100% (36/36) with those which have been pregnant for 51-79 days and unpregnant cows. The coincidence rates of the fetal blood flow sound with the diagnosis of rectal palpation during 59-65 and 70-86 days were 48.15% (13/27), 90.35%(25/27).The result shows that the time when the sound of uterine blood flow could be detected is 30-40 days earlier than that of the heart beat and the fetal blood flow, and its coincidence rate with the result of rectal palpation is higher. Therefore, the sound of fetal blood flow can be regarded as the main basis for pregnancy diagnosis at the early stage of gestation in dairy cows.更多还原