Lactational variation and relationship to postnatal growth of insulin-like growth factor-I in mammary secretions from genetically diverse sows.

@article{Simmen1990LactationalVA,
  title={Lactational variation and relationship to postnatal growth of insulin-like growth factor-I in mammary secretions from genetically diverse sows.},
  author={Frank A Simmen and Kwang Youn Whang and Rosalia C. M. Simmen and G. A. Peterson and M. J. D. Bishop and Kristina M. Irvin},
  journal={Domestic animal endocrinology},
  year={1990},
  volume={7 2},
  pages={199-206}
}
Mammary secretions obtained from four groups of sows at parturition and on days 7, 14 and 21 of lactation were defatted and assayed for total protein and insulin-like growth factor-I (IGF-I). Sows (n = 57) represented two breeds (Landrace and Duroc) and two genetic lines (selected for differences in sow productivity index, SPI) within each breed. Colostrum of Duroc sows was 4-6 fold and 30-60 fold greater in protein (P less than .001) and IGF-I (P less than .001) concentrations, respectively… CONTINUE READING

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