Studies on the accident rate in single and multiple births in dairy cows

We investigated the incidence of multiple births and its change in the MK area within T Branch,  Hokkaido,  and the accident rate at the time of birth and the production indices in single and multiple births among primiparous and multiparous cows in T Branch to clarify the accident rate at the time ...

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Veröffentlicht in:Japanese Journal of Large Animal Clinics 2010/06/30, Vol.1(1), pp.5-9
Hauptverfasser: Miyake, Y-I., Miyoshi, K., Moriya, H., Matsui, M., Haneda, S.
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Sprache:eng ; jpn
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Zusammenfassung:We investigated the incidence of multiple births and its change in the MK area within T Branch,  Hokkaido,  and the accident rate at the time of birth and the production indices in single and multiple births among primiparous and multiparous cows in T Branch to clarify the accident rate at the time of birth in dairy cattle.  1) The incidence of multiple births significantly increased from 2.76% in 1972 to 4.18% in 2004-2007.  2) The incidence of multiple births in multiparous cows was significantly higher than in primiparous cows(5.18  % vs.  1.13 %). 3) The accident rate in multiple births was significantly higher than in single births(37.48%  vs.  6.53%). 4) The accident rates in single births and multiple births among primiparous cows were significantly higher than among multiparous cows(9.34%  & 45.25 % vs.  5.38 % & 36.82 %). 5) The production rate(number  of newborn calves per parturition) and the ratio of calves born(number  of newborn calves/number of fetuses) in multiple births among primiparous cows were significantly different from those in single births among primiparous cows(1.33  & 0.66 vs.  0.91 & 0.91).  Similarly,  the production rate and the ratio of calves born in multiple births among multiparous cows were significantly different from those in single births among multiparous cows(1.48  & 0.74 vs.  0.95 & 0.95).
ISSN:1884-684X
2187-2805
DOI:10.4190/jjlac.1.5