Investigation of fetal loss in ewe lambs in relation to liveweight changes and progesterone concentrations in early to mid gestation

References

• Al-Gubory KH, Solari A, Mirman B. Effects of luteectomy on the maintenance of pregnancy, circulating progesterone concentrations and lambing performance in sheep. Reproduction, Fertility and Development 11, 317–22, 1999 doi: 10.1071/RD99079
   PubMed Web of Science ®Google Scholar
• Bloomfield FH, Oliver MH, Hawkins P, Campbell M, Phillips DJ, Gluckman PD, Challis JRG, Harding JE. A periconceptional nutritional origin for non-infectious preterm birth. Science 300, 606, 2003 doi: 10.1126/science.1080803
   PubMed Web of Science ®Google Scholar
• Bloomfield FH, Oliver MH, Hawkins P, Holloway AC, Campbell M, Gluckman PD, Harding JE, Challis JR. Periconceptional undernutrition in sheep accelerates maturation of the fetal hypothalamic-pituitary-adrenal axis in late gestation. Endocrinology 145, 4278–85, 2004 doi: 10.1210/en.2004-0424
   PubMed Web of Science ®Google Scholar
• Corner-Thomas RA, Ridler AL, Morris ST, Kenyon PR. Ewe lamb live weight and body condition scores affect reproductive rates in commercial flocks. New Zealand Journal of Agricultural Research 58, 26–34, 2015 doi: 10.1080/00288233.2014.974766
   Web of Science ®Google Scholar
• Freer M, Moore AD, Donnelly JR. GRAZPLAN: decision support systems for Australian grazing enterprises—II. The animal biology model for feed intake, production and reproduction and the GrazFeed DSS. Agricultural Systems 54, 77–126, 1997 doi: 10.1016/S0308-521X(96)00045-5
   Web of Science ®Google Scholar
• Howe L, West DM, Collett MG, Tattersfield G, Pattison R, Pomroy WE, Kenyon PR, Morris ST, Williamson NB. The role of Neospora caninum in three cases of unexplained ewe abortions in the southern North Island of New Zealand. Small Ruminant Research 75, 115–22, 2008 doi: 10.1016/j.smallrumres.2007.08.001
   Web of Science ®Google Scholar
• Howe L, Collett MG, Pattison RS, Marshall J, West DM, Pomroy WE. Potential involvement of Neospora caninum in naturally occurring ovine abortions in New Zealand. Veterinary Parasitology 185, 64–71, 2012 doi: 10.1016/j.vetpar.2011.10.033
   PubMed Web of Science ®Google Scholar
• Jefferies BC. Body condition scoring and its use in management. Tasmanian Journal of Agriculture 32, 19–21, 1961
   Google Scholar
• Kenyon PR. Review of sheep body condition score in relation to production characteristics. New Zealand Journal of Agricultural Research 57, 38–64, 2014 doi: 10.1080/00288233.2013.857698
   Web of Science ®Google Scholar
• Kenyon PR, Morris ST, Burnham DL, West DM. Effect of nutrition during pregnancy on hogget pregnancy outcome and birthweight and liveweight of lambs. New Zealand Journal of Agricultural Research 51, 77–83, 2008 doi: 10.1080/00288230809510437
   Web of Science ®Google Scholar
• Kenyon PR, Thompson AN, Morris ST. Breeding ewe lambs successfully to improve lifetime performance. Small Ruminant Research 118, 2–15, 2014 doi: 10.1016/j.smallrumres.2013.12.022
   Web of Science ®Google Scholar
• *Marshall S. Investigation into severe foetal resorption found at scanning in hoggets. Proceedings of the 44th Annual Seminar of the Society of Sheep and Beef Cattle Veterinarians of the New Zealand Veterinary Association, Pp 6.11.1–5, 2014
   Google Scholar
• Morris ST, Kenyon PR, West DM. Effect of hogget nutrition in pregnancy on lamb birthweight and survival to weaning. New Zealand Journal of Agricultural Research 48, 165–75, 2005 doi: 10.1080/00288233.2005.9513647
   Web of Science ®Google Scholar
• Mulvaney FJ, Morris ST, Kenyon PR, West DM, Morel PCH. Effect of nutrition around the time of breeding and during pregnancy on yearling liveweight change, pregnancy loss and live weight and survivial of their offspring. Proceedings of the New Zealand Society of Animal Production 70, 91–5, 2010
   Google Scholar
• Ridler AL, Vallee E, Corner RA, Kenyon PR, Heuer C. Factors associated with fetal losses in ewe lambs on a New Zealand sheep farm. New Zealand Veterinary Journal 63, 330–4, 2015 doi: 10.1080/00480169.2015.1037813
   PubMed Web of Science ®Google Scholar
• Sammin D, Markey B, Bassett H, Buxton D. The ovine placenta and placentitis—A review. Veterinary Microbiology 135, 90–7, 2009 doi: 10.1016/j.vetmic.2008.09.054
   PubMed Web of Science ®Google Scholar
• Schreurs NM, Kenyon PR, Mulvaney FJ, Morel PCH, West DM, Morris, ST. Response of additional ewe lamb liveweight during gestation on birth and weaning weight of offspring and liveweight of the ewe lamb at weaning. Animal Production Science 50, 528–32, 2010 doi: 10.1071/AN09185
   Web of Science ®Google Scholar
• Spencer TE, Bazer FW. Conceptus signals for establishment and maintenance of pregnancy. Reproductive Biology and Endocrinology 2, 49, 2004 doi: 10.1186/1477-7827-2-49
   PubMedGoogle Scholar
• Wallace JM, Aitken RP, Cheyne MA. Nutrient partitioning and fetal growth in rapidly growing adolescent ewes. Reproduction 107, 183–90, 1996 doi: 10.1530/jrf.0.1070183
   Web of Science ®Google Scholar
• Wallace JM, Aitken RP, Cheyne MA, Humblot P. Pregnancy-specific protein B and progesterone concentrations in relation to nutritional regimen, placental mass and pregnancy outcome in growing adolescent ewes carrying singleton fetuses. Reproduction 109, 53–8, 1997 doi: 10.1530/jrf.0.1090053
   Web of Science ®Google Scholar
• *West DM, Collett MG, Perkins NR, Christodoulopoulos G, Morris ST, Kenyon PR. Investigations of foetal loss in maiden ewes. Proceedings of the 34th Annual Seminar of the Society of Sheep and Beef Cattle Veterinarians of the New Zealand Veterinary Association, 147–60, 2004
   Google Scholar