Reproduction in Domestic Animals

Nutrient Prioritization and Fertility in Dairy Cows 103stimulated function of granulosa and thecal cells. Endocr 12,53–59.Sutton ML, Gilchrist RB, Thompson JG, 2003: Effects of invivo and in vitro environments on the metabolism of thecumulus-oocyte complex and its influence on oocyte developmentalcapacity. Hum Reprod Update 9, 35–48.Tamminga S, Luteijn PA, Meijer RGM, 1997: Changes incomposition and energy content of liveweight loss in dairycows with time after parturition. Livestock Prod Sci 52, 129–155.Thatcher WW, Bilby TR, Bartolome JA, Silvestre F, StaplesCR, Santos JEP, 2006: Strategies for improving fertility inthe modern dairy cow. Theriogenology 65, 30–44.Van Knegsel ATM, Van den Brand H, Dijkstra J, van StraalenWM, Heetkamp MJW, Tamminga S, Kemp B, 2007a:Dietary energy source in dairy cows in early lactation:energy partitioning and milk composition. J Dairy Sci 90,1467–1476.Van Knegsel ATM, Van den Brand H, Dijkstra J, van StraalenWM, Jorritsma R, Tamminga S, Kemp B, 2007b: Effect ofglucogenic vs. lipogenic diets on energy balance, bloodmetabolites, and reproduction in primiparous and multiparousdairy cows in early lactation. J Dairy Sci 90, 3397–3409.Vanholder T, Leroy JLMR, Dewulf J, Duchateau L, CorynM, de Kruif A, 2005a: Hormonal and metabolic profiles ofhigh-yielding dairy cows prior to ovarian cyst formation orfirst ovulation post partum. Reprod Domest Anim 40, 460–469.Vanholder T, Leroy JLMR, Van Soom A, Opsomer G, MaesD, Coryn M, de Kruif A, 2005b: Effect of non-esterifiedfatty acids on bovine granulosa cell steroidogenesis andproliferation in vitro. Anim Reprod Sci 87, 33–44.Vanholder T, Opsomer G, de Kruif A, 2006a: Aetiology andpathogenesis of cystic ovarian follicles in dairy cattle: areview. Reprod Nutr Dev 46, 105–119.Vanholder T, Leroy JLMR, Van Soom A, Maes D, Coryn M,Fiers T, de Kruif A, Opsomer G, 2006b: Effect of nonesterifiedfatty acids on bovine theca cell steroidogenesis andproliferation in vitro. Anim Reprod Sci 92, 51–63.Vernon RG, 2002: Nutrient partitioning, lipid metabolism andrelevant imbalances. Proceedings of the 12th World BuiatricsCongress, Hannover, Germany, 18–23 August, 2002.Villa-Godoy A, Hughes TL, Emery RS, Chapin LT, FogwellRL, 1988: Association between energy balance and lutealfunction in lactating dairy cows. J Dairy Sci 71, 1063–1072.de Vries MJ, Veerkamp RF, 2000: Energy balance of dairycattle in relation to milk production variables and fertility.J Dairy Sci 83, 62–69.Wade GN, Jones JE, 2004: Neuroendocrinology of nutritionalinfertility. Am J Physiol. Regul, Integrative Comp Physiol287, 1277–1296.Wathes DC, Fenwick M, Cheng Z, Bourne N, Llewellyn S,Morris DG, Kenny D, Murphy J, Fitzpatrick R, 2007:Influence of negative energy balance on cyclicity and fertilityin the high producing dairy cow. Theriogenology 68, S232–S241.Webb R, Garnsworthy PC, Gong JG, Robinson RS, WathesDC, 1999: Consequences for reproductive function ofmetabolic adaptation to load. Anim Sci Occasion Publ 24,99–112.Wilson SJ, Marion RS, Spain JN, Spiers DE, Keisler DH,Lucy MC, 1998: Effect of controlled heat stress on ovarianfunction in dairy cattle: I. Lactating cows. J Dairy Sci 1,2124–2131.Wiltbank MC, Sartori R, Sangsritavong S, Lopez H, HaughianJM, Fricke PM, Gumen A, 2001: Novel effects ofnutrition on reproduction in lactating dairy cows. J DairySci Suppl 84, 32 (abstract).Wiltbank M, Lopez H, Sartori R, Sangsritavong S, Gu¨ men A,2006: Changes in reproductive physiology of lactating dairycows due to elevated steroid metabolism. Theriogenology65, 17–29.Wolfenson D, Lew BJ, Thatcher WW, Graber Y, Meidan R,1997: Seasonal and acute heat stress effects on steroidproduction by dominant follicles in cow. Anim Reprod Sci47, 9–19.Wynne K, Stanley S, McGowan B, Bloom S, 2005: Appetitecontrol. J Endocrinol 184, 291–318.Yaakub H, O’Callaghan D, Boland MP, 1999: Effect ofroughage type and concentrate supplementation on folliclenumbers and in vitro fertilisation on follicle numbers and invitro fertilisation and development of oocytes recoveredfrom beef heifers. Anim Reprod Sci 44, 1–12.Zhao F, Dixon WT, Kennelly JJ, 1996: Localization and geneexpression of glucose transporters in bovine mammarygland. Comprehens Biochem Physiol 115, 127–134.Zieba DA, Amstalden M, Williams GL, 2005: Regulatoryroles of leptin in reproduction and metabolism: a comparativereview. Domest Anim Endocrinol 29, 166–185.Author’s address (for correspondence): J Leroy, Laboratory forVeterinary Physiology, Department of Veterinary Sciences, Facultyof Pharmaceutical, Biomedical and Veterinary Sciences, University ofAntwerp, Universiteitsplein 1, Gebouw U, B-2610 Wilrijk, Belgium.E-mail: jo.leroy@ua.ac.beConflict of interests: All authors declare no conflict of interests.Ó 2008 The Authors. Journal compilation Ó 2008 Blackwell Verlag