Trächtigkeitsfeststellung beim Rind mit dem Echolot-Verfahren |
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| Authors: | W Holtz H Meinhard B Blum |
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| Institution: | Institut für Tierzucht und Haustiergenetik der Universität Göttingen |
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| Abstract: | Pregnancy detection in cows by pulse mode ultrasound
Two commercially available pulse mode ultrasound instruments for pregnancy detection in cows were examined by testing 50 pregnant Friesian cows twice weekly. Absolutely reliable results were obtained after d 181 ("Cow-Tone") and d 221 of pregnancy (Preg-Alert 7 respectively. A newly constructed instrument ("HK-Rheintechnik") operating with greater wavelength (0,7 MHz) was tested in a similar fashion on 62 pregnant cows. Zt produced absolutely reliable results from d 135 of pregnancy on, i.e. 46 days sooner than the best of the commercial instruments tested . |
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