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Evaluation of a contract breeding management program in selected Ohio dairy herds with event-time analysis II. Parametric frailty models.
Meadows C, Rajala-Schultz PJ, Frazer GS, Phillips G, Meiring RW, Hoblet KH. Meadows C, et al. Among authors: rajala schultz pj. 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 …