Farmer record of pregnancy status pre-slaughter compared with actual pregnancy status post-slaughter and prevalence of gross genital tract abnormalities in New Zealand dairy cows

References

• Abbitt , B , Ball , L , Kitto , GP , Sitzman , CG , Wilgenburg , B , Raim , LW and Seidel , GE . 1978 . Effect of three methods of palpation for pregnancy diagnosis per rectum on embryonic and fetal attrition in cows . Journal of the American Veterinary Medical Association , 173 : 973 – 977 .
   PubMedGoogle Scholar
• Al-Dahash , SYA and David , JSE . 1977 . The incidence of ovarian activity, pregnancy and bovine genital abnormalities shown by an abattoir survey . The Veterinary Record , 101 : 296 – 299 .
   PubMed Web of Science ®Google Scholar
• Anonymous . 1996 . 1995/96 Dairy Statistics 12 – 42 . Hamilton : Livestock Improvement Corporation Ltd, .
   Google Scholar
• Arthur , GH , Noakes , DE and Pearson , H . 1983 . Veterinary reproduction and obstetrics , 6pth edition 341 – 416 . London : Bailliere Tindall, .
   Google Scholar
• Ball , L . 1980 . “ Pregnancy diagnosis in the cow ” . In Current Therapy in Theriogenology , 2pnd edition Edited by: Morrow , DA . 229 – 35 . Philadelphia : WB Saunders, .
   Google Scholar
• Crabb , HK . 1998 . The development of a computer model for the replacement of dairy cattle in seasonally calving herds in New Zealand 93 – 163 . Palmerston North : Massey University, . MVSc thesis
   Google Scholar
• David , JSE . 1971 . Reproductive expectancy and infertility in cattle . The Veterinary Record , 89 : 181 – 185 .
   PubMedGoogle Scholar
• Galligan , DT , Ferguson , J , Dijkhuizen , AA and Huirne , RBM . 1996 . “ Optimal economic goals in reproduction: underlying concepts from semen to culling ” . In Advanced Dairy Production Workbook , Vol. II , 945 – 954 . Sydney : Post Graduate Foundation in Veterinary Science, University of Sydney . Proceedings No. 269
   Google Scholar
• Hayes , D . 1997 . The development of an expert system for diagnosing reproductive problems in seasonal dairy herds 69 – 83 . Palmerston North : Massey University, . MVSc thesis
   Google Scholar
• Holmes , CW , Wilson , GF , MacKenzie , DDS , Flux , DS , Brookes , IM and Davey , AWF . 1984 . Milk production from pasture 1 – 46 . Wellington : Butterworths of New Zealand Ltd, .
   Google Scholar
• McEntee , K . 1990 . Reproductive pathology of domestic animals 1 – 223 . New York : Academic Press, .
   Google Scholar
• Mueller , K , Wichtel , JJ and Williamson , NB . 1998 . “ Comparison of four methods of pregnancy diagnosis in seasonal dairy herds in the Manawatu ” . In Proceedings of the 15^pth Seminar of the Society of Dairy Cattle Veterinarians of the New Zealand Veterinary Association 263 – 270 .
   Google Scholar
• Obwolo , MJ and Ogaa , JS . 1990 . An abattoir survey of reproductive organ abnormalities in cows in Zimbabwe . Bulletin of Animal Health and Production in Africa , 38 : 173 – 176 .
   Google Scholar
• O' , Conner . 1996 . “ Alternative methods for determining pregnancy status ” . In Advanced Dairy Production Workbook Vol. I , 397 – 406 . Sydney : Proceedings No 269. Post Graduate Foundation in Veterinary Science, University of Sydney, .
   Google Scholar
• Roberts , SJ . 1986 . “ Infertility in the cow ” . In Veterinary obstetrics and genital diseases (theriogenology) , 3prd edition Edited by: Roberts , SJ . 434 – 580 . Roberts, Woodstock, Vermont
   Google Scholar
• Summers , PM . 1974 . An abattoir study of the genital pathology of cows in northern Australia . Australian Veterinary Journal , 50 : 403 – 406 .
   PubMedGoogle Scholar