Increased dietary protein in the second trimester of gestation increases live weight gain and carcass composition in weaner calves to 6 months of age

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Miguel-Pacheco, G. G. ; Curtain, L. D. ; Rutland, C. ; Knott, L. ; Norman, S. T. ; Phillips, N. J. ; Perry, V. E. A. (2016)
  • Publisher: Cambridge University Press
  • Journal: Animal, volume 11, issue 6, pages 991-999 (issn: 1751-7311, eissn: 1751-732X)
  • Related identifiers: pmc: PMC5441368, doi: 10.1017/S1751731116002330
  • Subject: foetal programming | Nutrition | Research Article | gestation diet | bovine | calf growth

Genetically similar nulliparous Polled Hereford heifers from a closed pedigree herd were used to evaluate the effects of dietary protein during the first and second trimester of gestation upon foetal, placental and postnatal growth. Heifers were randomly allocated into two groups at 35 days after artificial insemination (35 days post conception (dpc)) to a single bull and fed high (15.7% CP) or low (5.9% CP) protein in the first trimester (T1). At 90 dpc, half of each nutritional treatment group changed to a high- or low-protein diet for the second trimester until 180 dpc (T2). High protein intake in the second trimester increased birth weight in females (P=0.05), but there was no effect of treatment upon birth weight when taken over both sexes. Biparietal diameter was significantly increased by high protein in the second trimester with the effect being greater in the female (P=0.02), but also significant overall (P=0.05). Placental weight was positively correlated with birth weight, fibroblast volume and relative blood vessel volume (P<0.05). Placental fibroblast density was increased and trophoblast volume decreased in the high-protein first trimester treatment group (P<0.05). There was a trend for placental weight to be increased by high protein in the second trimester (P=0.06). Calves from heifers fed the high-protein treatment in the second trimester weighed significantly more on all occasions preweaning (at 1 month (P=0.0004), 2 months (P=0.006), 3 months (P=0.002), 4 months (P=0.01), 5 months (P=0.03), 6 months (P=0.001)), and grew at a faster rate over the 6-month period. By 6 months of age, the calves from heifers fed high nutrition in the second trimester weighed 33 kg heavier than those fed the low diet in the second trimester. These results suggest that dietary protein in early pregnancy alters the development of the bovine placenta and calf growth to weaning.
  • References (39)
    39 references, page 1 of 4

    Baur R 1977. Morphometry of the placental exchange areas. Advances in Anatomy Embryology and Cell Biology 53, 1-20.

    Bell AW, Hay W and Ehrhardt RA 1999. Placental transport of nutrients and its implications for fetal growth. Journal of Reproduction and Fertility 54, 401-410.

    Brameld JM, Mostyn A, Dandrea J, Stephenson TJ, Dawson JM, Buttery PJ and Symonds ME 2000. Maternal nutrition alters the expression of insulin-like growth factors in fetal sheep liver and skeletal muscle. Journal of Endocrinology 167, 429-437.

    Breier BH, Gluckman PD and Bass JJ 1988. Plasma concentrations of insulin-like growth factor-I and insulin in the infant calf: ontogeny and influence of altered nutrition. Journal of Endocrinology 119, 43-50.

    Cafe LM, Hennessy DW, Hearnshaw H, Morris ST and Greenwood PL 2006.

    Influences of nutrition during pregnancy and lactation on birthweights and growth to weaning of calves sired by Piedmontese and Wagyu bulls. Australian Journal of Experimental Agriculture 46, 245-255.

    Copping KJ, Hoare A, Callaghan M, McMillen IC, Rodgers RJ and Perry VEA 2014. Fetal programming in 2-year-old calving heifers: peri-conception and first trimester protein restriction alters fetal growth in a gender-specific manner.

    Animal Production Science 54, 1333-1337.

    Costello PM, Rowelerson A, Astaman NA, Anthony FEW, Sayer AA, Cooper C, Hanson MA and Green LR 2008. Peri-implantation and late gestation maternal undernutrition differentially affect fetal sheep skeletal muscle development.

    Journal of Physiology 586, 2371-2379.

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