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Evaluation of a contract breeding management program in selected Ohio dairy herds with event-time analysis II. Parametric frailty models.
Prev Vet Med. 2007 Jul 16;80(2-3):89-102. doi: 10.1016/j.prevetmed.2006.12.006. Epub 2007 Jan 22.
Prev Vet Med. 2007.
PMID: 17241680
All frailty terms were highly significant, regardless of whether it was an individual frailty at the lactation level or a shared frailty at the cow or herd level, suggesting that there was considerable heterogeneity within these levels. Inclusion of a frailty term at the h …
All frailty terms were highly significant, regardless of whether it was an individual frailty at the lactation level or a shared frailty at …
Epidemiology of reproductive performance in dairy cows.
Gröhn YT, Rajala-Schultz PJ.
Gröhn YT, et al. Among authors: rajala schultz pj.
Anim Reprod Sci. 2000 Jul 2;60-61:605-14. doi: 10.1016/s0378-4320(00)00085-3.
Anim Reprod Sci. 2000.
PMID: 10844228
Review.
Dystocia, retained placenta, and early metritis led to a short-term drop in milk production. High milk yield was not a major factor in delaying conception, except in first parity cows. ...
Dystocia, retained placenta, and early metritis led to a short-term drop in milk production. High milk yield was not a major factor i …
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