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Pregnant cow nutrition and its effects on foetal weight – a meta-analysis

Published online by Cambridge University Press:  09 May 2019

D. Zago Open the ORCID record for D. Zago [Opens in a new window] ,
M. E. A. Canozzi  and
J. O. J. Barcellos
D. Zago
Affiliation:
Department of Animal Science, Federal University of Rio Grande do Sul. Av. Bento Gonçalves n. 7712, 91540-000, Porto Alegre, RS, Brazil
M. E. A. Canozzi
Affiliation:
Instituto Nacional de Investigación Agropecuaria (INIA), Programa Producción de Carne y Lana, Estación Experimental INIA La Estanzuela, Ruta 50, km 11, 39173, Colonia, Uruguay
J. O. J. Barcellos*
Affiliation:
Department of Animal Science, Federal University of Rio Grande do Sul. Av. Bento Gonçalves n. 7712, 91540-000, Porto Alegre, RS, Brazil
*
Author for correspondence: J. O. J. Barcellos, E-mail: julio.barcellos@ufrgs.br
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Abstract

The prenatal development of cattle has influence on productive performance throughout postnatal life. The number of muscle and fat cells that the animal will have throughout its life is determined in the foetal stage and is influenced by nutrition of the pregnant cow. A systematic review and meta-analysis was performed to evaluate the effect of different energy levels (total digestible nutrient, TDN) and crude protein (CP) supplied to pregnant cows on foetal weight at 4 (FW4) and 8 months (FW8) and calf birth weight (CBW). Four studies and six trials involving 170 animals were assessed for FW4; four studies, four trials and 156 animals for FW8 and 48 studies, 125 trials and 9053 animals for CBW. High heterogeneity across studies was presented in FW4 (I2 = 94.4%), FW8 (I2 = 91.08%) and CBW (I2 = 96.9%). Dietary TDN and CP levels did not influence FW4. The FW8 was reduced by 2.24 kg when cows were fed 100% of their CP and TDN requirements (I2 = 0%), relative to those fed 70% of their requirements during the first and second trimesters. The CBW was reduced by 0.45 kg (I2 = 96.9%) when cows were fed 130% of their CP requirements relative to other dietary CP levels. When cows were fed 140% of their TDN requirements, CBW decreased by 2.71 kg (I2 = 98.3%) relative to other TDN levels. Dietary energy or CP levels fed above the requirements to pregnant cows restrict foetal development and CBW.

Keywords

Beef cattlebirth weightcow–calf herdfoetal programmingfoetal weight
Type
Animal Research Paper
Information
The Journal of Agricultural Science , Volume 157 , Issue 1 , January 2019 , pp. 83 - 95
Copyright
Copyright © Cambridge University Press 2019 

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References

Barcellos, JOJ, Queiroz Filho, LA, Ceolin, CA, Gianezini, M, McManus, C, Malafaia, GC and Oaigen, RP (2011) Technological innovation and entrepreneurship in animal production. Revista Brasileira de Zootecnia 40(suppl. especial), 189–200.Google Scholar
Basarab, J, Baron, V, López-Campos, Ó, Aalhus, J, Haugen-Kozyra, K and Okine, E (2012) Greenhouse gas emissions from calf- and yearling-fed beef production systems, with and without the use of growth promotants. Animals 2, 195–220.Google Scholar
Bassett, JM (1991) Current perspectives on placental development and its integration with fetal growth. Proceedings of the Nutrition Society 50, 311–319.Google Scholar
Bauman, DE and Currie, WB (1980) Partitioning of nutrients during pregnancy and lactation: a review of mechanisms involving homeostasis and homeorhesis. Journal Dairy Science 63, 1514–1529.Google Scholar
Beck, TJ, Simms, DD, Cochran, RC, Brandt, RT, Vanzant, ES and Kuhl, GL (1992) Supplementation of ammoniated wheat straw: performance and forage utilization characteristics in beef cattle receiving energy and protein supplements. Journal of Animal Science 70, 349–357.Google Scholar
Bee, G (2004) Effect of early gestation feeding, birth weight, and gender of progeny on muscle fiber characteristics of pigs at slaughter. Journal of Animal Science 82, 826–836.Google Scholar
Bellows, RA and Short, RE (1978) Effects of precalving feed level on birth weight, calving difficulty and subsequent fertility. Journal of Animal Science 46, 1522–1528.Google Scholar
Borenstein, M, Hedges, LV, Higgins, JPT and Rothstein, HR (2009) Introduction to Meta-Analysis. Chichester, UK: John Wiley and Sons, Ltd.Google Scholar
Camacho, LE, Lemley, CO, Van Emon, ML, Caton, JS, Swanson, KC and Vonnahme, KA (2014) Effects of maternal nutrient restriction followed by realimentation during early and midgestation on beef cows. I. Maternal performance and organ weights at different stages of gestation. Journal of Animal Science 92, 520–529.Google Scholar
Camacho, LE, Lemley, CO, Dorsam, ST, Swanson, KC and Vonnahme, KA (2018) Effects of maternal nutrient restriction followed by realimentation during early and mid-gestation in beef cows. II. Placental development, umbilical blood flow, and uterine blood flow responses to diet alterations. Theriogenology 116, 1–11.Google Scholar
Canozzi, MEA, Mederos, A, Manteca, X, Turner, S, McManus, C, Zago, D and Barcellos, JOJ (2017) A meta-analysis of cortisol concentration, vocalization, and average daily gain associated with castration in beef cattle. Research in Veterinary Science 114, 430–443.Google Scholar
Carstens, GE, Johnson, DE, Holland, MD and Odde, KG (1987) Effects of prepartum protein nutrition and birth weight on basal metabolism in bovine neonates. Journal of Animal Science 65, 745–751.Google Scholar
Caton, JS and Hess, BW (2010) Maternal plane of nutrition: impacts on foetal outcomes and postnatal offspring responses. In Hess, CBW, DelCurto, T, Bowman, JGP and Waterman, RC (eds), Proceedings 4th Grazing Livestock Nutrition Conference. Champaign, Illinois, USA: Western Section American Society of Animal Science, pp. 104–122.Google Scholar
Ceballos, A, Sánchez, J, Stryhn, H, Montgomery, JB, Barkema, HW and Wichtel, JJ (2009) Meta-analysis of the effect of oral selenium supplementation on milk selenium concentration in cattle. Journal of Dairy Science 92, 324–342.Google Scholar
Clarke, L, Heasman, L, Juniper, DT and Symonds, ME (1998) Maternal nutrition in early-mid gestation and placental size in sheep. British Journal of Nutrition 79, 359–364.Google Scholar
Corah, LR, Quealy, AP, Dunn, TG and Kaltenbach, CC (1974) Prepartum and postpartum levels of progesterone and estradiol in beef heifers fed two levels of energy. Journal of Animal Science 39, 380–385.Google Scholar
Corah, LR, Dunn, TG and Kaltenbach, CC (1975) Influence of prepartum nutrition on the reproductive performance of beef females and the performance of their progeny. Journal of Animal Science 41, 819–824.Google Scholar
Da Silva, P, Aitken, RP, Rhind, SM, Racey, PA and Wallace, JM (2001) Influence of placentally mediated foetal growth restriction on the onset of puberty in male and female lambs. Reproduction 122, 375–383.Google Scholar
DerSimonian, R and Laird, N (1986) Meta-analysis in clinical trials. Controlled Clinical Trials 7, 177–188.Google Scholar
Dickerson, G (1970) Efficiency of animal production – molding the biological components. Journal of Animal Science 30, 849–859.Google Scholar
Domokos, Z, Vertse Zándoki, R and Tőzsér, J (2011) Change of body condition of charolais cows in relation of birth and weaning weight of calves, process of calving and period until next pregnancy in two stock herds. Bulletin UASVM Animal Science and Biotechnologies 68, 6–14.Google Scholar
Du, M, Tong, J, Zhao, J, Underwood, KR, Zhu, M, Ford, SP and Nathanielsz, PW (2010 a) Fetal programming of skeletal muscle development in ruminant animals. Journal of Animal Science 88(13 Suppl), E51–E60.Google Scholar
Du, M, Yan, X, Tong, JF, Zhao, J and Zhu, MJ (2010 b) Maternal obesity, inflammation, and fetal skeletal muscle development. Biology of Reproduction 82, 4–12.Google Scholar
Du, M, Huang, Y, Das, AK, Yang, Q, Duarte, MS, Dodson, MV and Zhu, MJ (2013) Manipulating mesenchymal progenitor cell differentiation to optimize performance and carcass value of beef cattle. Journal of Animal Science 91, 1419–1427.Google Scholar
Du, M, Wang, B, Fu, X, Yang, Q and Zhu, MJ (2015) Fetal programming in meat production. Meat Science 109, 40–47.Google Scholar
Duarte, MS, Gionbelli, MP, Paulino, PVR, Serão, NVL, Martins, TS, Tótaro, PIS, Neves, CA, Valadares Filho, SC, Dodson, MV, Zhu, M and Du, M (2013) Effects of maternal nutrition on development of gastrointestinal tract of bovine foetus at different stages of gestation. Livestock Science 153, 60–65.Google Scholar
Durunna, ON, Block, HC, Iwaasa, AD, Thompson, LC, Scott, SL, Robins, C, Khakbazan, M and Lardner, HA (2014) Impact of calving seasons and feeding systems in western Canada. I. Postweaning growth performance and carcass characteristics of crossbred steers. Canadian Journal of Animal Science 94, 571–582.Google Scholar
Duval, S and Tweedie, R (2000) Trim and fill: a simple funnel-plot-based method of testing and adjusting for publication bias in meta-analysis. Biometrics 56, 455–463.Google Scholar
Egger, M, Smith, GD and Altman, DG (2001) Systematic Reviews in Health Care. London, UK: MBJ Publishing Group.Google Scholar
Erhardt, RA and Bell, AW (1995) Growth and metabolism of the ovine placenta during mid-gestation. Placenta 16, 727–741.Google Scholar
Ferrell, CL (1991) Maternal and fetal influences on uterine and conceptus development in the cow: I. Growth of the tissues of the gravid uterus. Journal of Animal Science 69, 1945–1953.Google Scholar
Ferrell, CL, Garrett, WN and Hinman, N (1976) Growth, development and composition of the udder and gravid uterus of beef heifers during pregnancy. Journal of Animal Science 42, 1477–1489.Google Scholar
Fiems, LO, Van Caelenbergh, W, Vanacker, JM, De Campeneere, S and Seynaeve, M (2005) Prediction of empty body composition of double-muscled beef cows. Livestock Production Science 92, 249–259.Google Scholar
Funston, RN and Summers, AF (2013) Effect of prenatal programming on heifer development. Veterinary Clinics: Food Animal Practice 29, 517–536.Google Scholar
Funston, RN, Martin, JL, Adams, DC and Larson, DM (2010) Winter grazing system and supplementation of beef cows during late gestation influence heifer progeny. Journal of Animal Science 88, 4094–4101.Google Scholar
Garay, ODV, Murillo, JMF, Pérez, MJH, Guerra, CJY, Jiménez, CM, Ríos, TEB and Coma, JR (2014) Efectos raciales, de heterosis y parámetros genéticos para peso al nacer en una población multirracial de ganado de carne em Colombia. Livestock Research for Rural Development 26, 3. Available online from http://www.lrrd.org/lrrd26/3/verg26058.html (accessed 6 March 2019).Google Scholar
Gonzalez, JM, Camacho, LE, Ebarb, SM, Swanson, KC, Vonnahme, KA, Stelzleni, AM and Johnson, SE (2013) Realimentation of nutrient restricted pregnant beef cows supports compensatory fetal muscle growth. Journal of Animal Science 91, 4797–4806.Google Scholar
Greenwood, PL, Hunt, AS, Hermanson, JW and Bell, AW (2000) Effects of birth weight and postnatal nutrition on neonatal sheep: II. Skeletal muscle growth and development. Journal of Animal Science 78, 50–61.Google Scholar
Gutiérrez, V, Espasandín, AC, Machado, P, Bielli, A, Genovese, P and Carriquiry, M (2014) Effects of calf early nutrition on muscle fiber characteristics and gene expression. Livestock Science 167, 408–416.Google Scholar
Han, IK, Bosi, P, Hyun, Y, Kim, JD, Sohn, KS and Kim, SW (2000) Recent advances in sow nutrition to improve reproductive performance. Asian-Australasian Journal of Animal Sciences 13(Sp Iss), 335–355.Google Scholar
Herring, CM, Bazer, FW, Johnson, GA and G, W (2018) Impacts of maternal dietary protein intake on fetal survival, growth, and development. Experimental Biology and Medicine 243, 525–533.Google Scholar
Higgins, JPT and Green, S (2011) Cochrane Handbook for Systematic Reviews of Interventions Version 5.1.0 [updated March 2011]. London, UK: The Cochrane Collaboration. Available online from http://handbook-5-1.cochrane.org/ (accessed 6 March 2019).Google Scholar
Higgins, JPT, Thompson, SG, Deeks, JJ and Altman, DG (2003) Measuring inconsistency in meta-analyses. BMJ: British Medical Journal 327, 557–560.Google Scholar
Houghton, PL, Lemenager, RP, Horstman, LA, Hendrix, KS and Moss, GE (1990) Effects of body composition, pre-and postpartum energy level and early weaning on reproductive performance of beef cows and preweaning calf gain. Journal of Animal Science 68, 1438–1446.Google Scholar
Hyttel, P, Sinowatz, F and Vejlsted, M (2012) Embriologia Veterinária. Rio de Janeiro, Brasil: Elsevier Editora Ltda.Google Scholar
Jones, SJ, Starkey, D, Calkins, CR and Crouse, JD (1990) Myofibrillar protein turnover in feed-restricted and realimented beef cattle. Journal of Animal Science 68, 2707–2715.Google Scholar
Kelly, RW (1992) Nutrition and placental development. Proceedings of the Nutrition Society of Australia 17, 203–211.Google Scholar
Klein, SI, Steichen, PL, Islas, A, Goulart, RS, Gilbery, TC, Bauer, ML, Swanson, KC and Dahlen, CR (2014) Effects of alternate-day feeding of dried distiller's grain plus solubles to forage-fed beef cows in mid-to late gestation. Journal of Animal Science 92, 2677–2685.Google Scholar
Köster, HH, Woods, BC, Cochran, RC, Vanzant, ES, Titgemeyer, EC, Grieger, DM, Olson, KC and Stokka, G (2002) Effect of increasing proportion of supplemental N from urea in prepartum supplements on range beef cow performance and on forage intake and digestibility by steers fed low-quality forage. Journal of Animal Science 80, 1652–1662.Google Scholar
Larson, DM, Martin, JL, Adams, DC and Funston, RN (2009) Winter grazing system and supplementation during late gestation influence performance of beef cows and steer progeny. Journal of Animal Science 87, 1147–1155.Google Scholar
Lobato, JFP, Zanotta Júnior, RLD and Pereira Neto, OA (1998) Efeitos das dietas pré e pós-parto de vacas primíparas sobre o desenvolvimento dos bezerros. Revista Brasileira de Zootecnia 27, 863–867.Google Scholar
Lodman, DW, Petersen, MK, Clark, CK, Wiley, JS, Havstad, KM and McInerney, MJ (1990) Substitution of DL-methionine for soybean meal as a winter supplement for gestating cows grazing native range. Journal of Animal Science 68, 4361–4375.Google Scholar
Long, NM, Vonnahme, KA, Hess, BW, Nathanielsz, PW and Ford, SP (2009) Effects of early gestational undernutrition on fetal growth, organ development, and placentomal composition in the bovine. Journal of Animal Science 87, 1950–1959.Google Scholar
Long, NM, Prado-Cooper, MJ, Krehbiel, CR and Wettemann, RP (2010) Effects of nutrient restriction of bovine dams during early gestation on postnatal growth and regulation of plasma glucose. Journal of Animal Science 88, 3262–3268.Google Scholar
Martin, JL, Rasby, RJ, Brink, DR, Lindquist, RU, Keisler, DH and Kachman, SD (2005) Effects of supplementation of whole corn germ on reproductive performance, calf performance, and leptin concentration in primiparous and mature beef cows. Journal of Animal Science 83, 2663–2670.Google Scholar
Mederos, A, Waddell, L, Sánchez, J, Kelton, D, Peregrine, AS, Menzies, P, VanLeeuwen, J and Rajic, A (2012) A systematic review-meta-analysis of primary research investigating the effect of selected alternative treatments on gastrointestinal nematodes in sheep under field conditions. Preventive Veterinary Medicine 104, 1–14.Google Scholar
Meyer, AM, Reed, JJ, Vonnahme, KA, Soto-Navarro, SA, Reynolds, LP, Ford, SP, Hess, BW and Caton, JS (2010) Effects of stage of gestation and nutrient restriction during early to mid-gestation on maternal and fetal visceral organ mass and indices of jejunal growth and vascularity in beef cows. Journal of Animal Science 88, 2410–2424.Google Scholar
Micke, GC, Sullivan, TM, Magalhaes, RJS, Rolls, PJ, Norman, ST and Perry, VEA (2010) Heifer nutrition during early- and mid-pregnancy alters fetal growth trajectory and birth weight. Animal Reproduction Science 117, 1–10.Google Scholar
Micke, GC, Sullivan, TM, McMillen, IC, Gentili, S and Perry, VEA (2011) Protein intake during gestation affects postnatal bovine skeletal muscle growth and relative expression of IGF1, IGF1R, IGF2 and IGF2R. Molecular and Cellular Endocrinology 332, 234–241.Google Scholar
Micke, GC, Sullivan, TM, Kennaway, DJ, Hernandez-Medrano, J and Perry, VEA (2015) Maternal endocrine adaptation throughout pregnancy to nutrient manipulation: consequences for sexually dimorphic programming of thyroid hormones and development of their progeny. Theriogenology 83, 604–615.Google Scholar
Miner, JL, Petersen, MK, Havstad, KM, McInerney, MJ and Bellows, RA (1990) The effects of ruminal escape protein or fat on nutritional status of pregnant winter-grazing beef cows. Journal of Animal Science 68, 1743–1750.Google Scholar
Moher, D, Liberati, A, Tetzlaff, J, Altman, DG and the PRISMA Group (2009) Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. Annals of Internal Medicine 151, 264–269.Google Scholar
Moisá, SJ, Shike, DW, Shoup, L, Rodriguez-Zas, SL and Loor, JJ (2015) Maternal plane of nutrition during late gestation and weaning age alter Angus × Simmental offspring longissimus muscle transcriptome and intramuscular fat. PLoS ONE 10, e0131478. https://doi.org/10.1371/journal.pone.0131478.Google Scholar
Moriel, P, Artioli, LFA, Piccolo, MB, Marques, RS, Poore, MH and Cooke, RF (2016) Frequency of wet brewers grains supplementation during late gestation of beef cows and its effects on offspring postnatal growth and immunity. Journal of Animal Science 94, 2553–2563.Google Scholar
NRC – National Research Council (1984) Nutrient Requirements of Domestic Animals. Washington, D.C.: USA: NRC.Google Scholar
NRC – National Research Council (1996) Nutrient Requirements of Beef Cattle. Washington, D.C.: USA: NRC.Google Scholar
Pate, FM, Sanson, DW and Machen, RV (1990) Value of a molasses mixture containing natural protein as a supplement to brood cows offered low-quality forages. Journal of Animal Science 68, 618–623.Google Scholar
Perry, RC, Corah, LR, Cochran, RC, Beal, WE, Stevenson, JS, Minton, JE, Simms, DD and Brethour, JR (1991) Influence of dietary energy on follicular development, serum gonadotropins, and first postpartum ovulation in suckled beef cows. Journal of Animal Science 69, 3762–3773.Google Scholar
Perry, VEA, Norman, ST, Owen, JA, Daniel, RCW and Phillips, N (1999) Low dietary protein during early pregnancy alters bovine placental development. Animal Reproduction Science 55, 13–21.Google Scholar
Pruitt, RJ and Momont, PA (1987) Effects of Body Condition on Reproductive Performance of Range Beef Cows. South Dakota Beef Report Paper 10. South Dakota, USA: South Dakota State University. Available online from: https://openprairie.sdstate.edu/sd_beefreport_1987/10 (accessed 6 March 2019).Google Scholar
Radunz, AE, Fluharty, FL, Day, ML, Zerby, HN and Loerch, SC (2010) Prepartum dietary energy source fed to beef cows: I. Effects on pre-and postpartum cow performance. Journal of Animal Science 88, 2717–2728.Google Scholar
Radunz, AE, Fluharty, FL, Relling, AE, Felix, TL, Shoup, LM, Zerby, HN and Loerch, SC (2012) Prepartum dietary energy source fed to beef cows: II. Effects on progeny postnatal growth, glucose tolerance, and carcass composition. Journal of Animal Science 90, 4962–4974.Google Scholar
Rehfeldt, C, Te Pas, MF, Wimmers, K, Brameld, JM, Nissen, PM, Berri, C, Valente, LM, Power, DM, Picard, B, Stickland, NC and Oksbjerg, N (2011) Advances in research on the prenatal development of skeletal muscle in animals in relation to the quality of muscle-based food. I. Regulation of myogenesis and environmental impact. Animal: An International Journal of Animal Bioscience 5, 703–717.Google Scholar
Reid, JT, Ward, GM and Salsbury, R (1948) Mineral metabolism studies in dairy cattle. IV Effects of mineral supplementation of the prepartal diet upon the composition of the blood of cows and their calves at parturition. Journal of Nutrition 36, 75–89.Google Scholar
Reynolds, LP and Redmer, DA (1995) Utero-placental vascular development and placental function. Journal of Animal Science 73, 1839–1851.Google Scholar
Robinson, JJ (1977) The influence of maternal nutrition on ovine foetal growth. Proceedings of the Nutrition Society 36, 9–16.Google Scholar
Shell, TM, Early, RJ, Carpenter, JR, Vincent, DL and Buckley, BA (1995) Prepartum nutrition and solar radiation in beef cattle: I. Relationships of body fluid compartments, packed cell volume, plasma urea nitrogen, and estrogens to prenatal development. Journal of Animal Science 73, 1289–1302.Google Scholar
Sims, PL and Bailey, DW (1995) Calf production by Angus-Hereford and Brahman-Hereford cows on two native rangeland forage systems. Journal of Animal Science 73, 2893–2902.Google Scholar
Soto-Murillo, HW, Faulkner, DB, Gianola, D and Cmarik, GF (1993) Effect of breed of sire, breed of dam, pasture program and of their interactions on preweaning performance of crossbred beef calves. Livestock Production Science 33, 55–66.Google Scholar
Spitzer, JC, Morrison, DG, Wettemann, RP and Faulkner, LC (1995) Reproductive responses and calf birth and weaning weights as affected by body condition at parturition and postpartum weight gain in primiparous beef cows. Journal of Animal Science 73, 1251–1257.Google Scholar
Stalker, LA, Adams, DC, Klopfenstein, TJ, Feuz, DM and Funston, RN (2006) Effects of pre and postpartum nutrition on reproduction in spring calving cows and calf feedlot performance. Journal of Animal Science 84, 2582–2589.Google Scholar
Sullivan, T, Micke, G, Perkins, N, Martin, G, Wallace, C, Gatford, K, Owens, J and Perry, V (2009) Dietary protein during gestation affects maternal IGF, IGFBP, leptin concentrations, and fetal growth in heifers. Journal of Animal Science 87, 3304–3316.Google Scholar
Summers, AF, Blair, AD and Funston, RN (2015 a) Impact of supplemental protein source offered to primiparous heifers during gestation on II. Progeny performance and carcass characteristics. Journal of Animal Science 93, 1871–1880.Google Scholar
Summers, AF, Meyer, TL and Funston, RN (2015 b) Impact of supplemental protein source offered to primiparous heifers during gestation on I. Average daily gain, feed intake, calf birth body weight, and rebreeding in pregnant beef heifers. Journal of Animal Science 93, 1865–1870.Google Scholar
Swanson, LD and Bewtra, C (2008) Increase in normal placental weights related to increase in maternal body mass index. The Journal of Maternal-Fetal & Neonatal Medicine 21, 111–113.Google Scholar
Tedeschi, LO, Fonseca, MA, Muir, JP, Poppi, DP, Carstens, GE, Angerer, JP and Fox, DG (2017) A glimpse of the future in animal nutrition science. 2. Current and future solutions. Revista Brasileira de Zootecnia 46, 452–469.Google Scholar
Tong, JF, Yan, X, Zhu, MJ, Ford, SP, Nathanielsz, PW and Du, M (2009) Maternal obesity downregulates myogenesis and β-catenin signaling in fetal skeletal muscle. American Journal of Physiology-Endocrinology and Metabolism 296, E917–E924.Google Scholar
Valadares Filho, SDC, Marcondes, MI, Chizzotti, ML and Paulino, PVR (2010) Exigências Nutricionais de Zebuínos Puros e Cruzados: BR-CORTE. Viçosa, MG, Brazil: UFV.Google Scholar
Wallace, JM, Luther, JS, Milne, JS, Aitken, RP, Redmer, DA, Reynolds, LP and Hay, WW (2006) Nutritional modulation of adolescent pregnancy outcome – a review. Placenta 27(Suppl.), 61–68.Google Scholar
Webster, AJF (1981) The energetic efficiency of metabolism. Proceedings of the Nutrition Society 40, 121–128.Google Scholar
Wilson, TB, Schroeder, AR, Ireland, FA, Faulkner, DB and Shike, DW (2015 a) Effects of late gestation distillers grains supplementation on fall-calving beef cow performance and steer calf growth and carcass characteristics. Journal of Animal Science 93, 4843–4851.Google Scholar
Wilson, TB, Faulkner, DB and Shike, DW (2015 b) Influence of late gestation drylot rations differing in protein degradability and fat content on beef cow and subsequent calf performance. Journal of Animal Science 93, 5819–5828.Google Scholar
Wilson, TB, Long, NM, Faulkner, DB and Shike, DW (2016 a) Influence of excessive dietary protein intake during late gestation on drylot beef cow performance and progeny growth, carcass characteristics, and plasma glucose and insulin concentrations. Journal of Animal Science 94, 2035–2046.Google Scholar
Wilson, TB, Faulkner, DB and Shike, DW (2016 b) Influence of prepartum dietary energy on beef cow performance and calf growth and carcass characteristics. Livestock Science 184, 21–27.Google Scholar
Wiltbank, JN, Rowden, WW, Ingalls, JE, Geegoey, KE and Koch, RM (1962) Effect of energy level on reproductive phenomena of mature Hereford cows. Journal of Animal Science 21, 219–225.Google Scholar
Wiltbank, JN, Bond, J, Warwick, EJ, Davis, RE, Cook, AC, Reynolds, WL and Hasen, MW (1965) Influence of Total Feed and Protein Intake on Reproductive Performance of the Beef Female Through Second Calving. Technical bulletin no. 1314. Washington, D.C., USA: USDA.Google Scholar
Winterholler, SJ, Lalman, DL, Hudson, MD and Goad, CL (2009) Supplemental energy and extruded-expelled cottonseed meal as a supplemental protein source for beef cows consuming low-quality forage. Journal of Animal Science 87, 3003–3012.Google Scholar
Winterholler, SJ, McMurphy, CP, Mourer, GL, Krehbiel, CR, Horn, GW and Lalman, DL (2012) Supplementation of dried distillers grains with solubles to beef cows consuming low-quality forage during late gestation and early lactation. Journal of Animal Science 90, 2014–2025.Google Scholar
Wood, KM, Kelly, MJ, Miller, SP, Mandell, IB and Swanson, KC (2010) Effect of crop residues in haylage-based rations on the performance of pregnant beef cows. Canadian Journal of Animal Science 90, 69–76.Google Scholar
Zehnder, CM, Maddock, TD, DiCostanzo, A, Miller, LR, Hall, JM and Lamb, GC (2010) Using alfalfa leaf meal as a supplement in late-gestation beef heifer and nursing beef calf diets. Journal of Animal Science 88, 2132–2138.Google Scholar