Effect of dietary-induced changes in plasma insulin concentrations during the early post partum period on pregnancy rate in dairy cows

Reproduction : the Official Journal of the Society for the Study of Fertility
P C GarnsworthyR Webb

Abstract

Dietary stimulation of insulin in post partum dairy cows has been found to enhance ovarian follicle development but to impair oocyte developmental competence. The objective of this study was to test the hypothesis that pregnancy rate would be improved by feeding a diet to stimulate higher insulin (H) until cows resumed ovarian cyclic activity after parturition, and then feeding a diet to lower insulin (L) during the mating period. Each diet was fed to 30 post partum dairy cows until their first rise in milk progesterone, when 15 cows in each group were transferred to the other diet (treatments HL and LH) and 15 cows in each group remained on their original diet (treatments HH and LL) until 120 days post partum. Treatments did not affect dry matter intake, milk yield and metabolisable energy balance. Plasma insulin concentration was elevated in cows fed on H compared with cows fed on L. Treatment did not affect days to first progesterone rise, first oestrus or first insemination. At 120 days post partum, 27% of cows on each of treatments HH, LL and LH were pregnant, but 60% of cows on treatment HL were pregnant (P=0.021). These findings support the concept that physiological relationships between insulin and the reproductive sys...Continue Reading

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Citations

Jun 24, 2003·Animal Reproduction Science·M Mihm, E C L Bleach
Jul 1, 2010·Animal : an International Journal of Animal Bioscience·N C FriggensH V Petit
Mar 24, 2012·Animal : an International Journal of Animal Bioscience·A R G Wylie
Mar 24, 2011·Reproduction, Fertility, and Development·R J ScaramuzziR Webb
Dec 17, 2009·Reproduction, Fertility, and Development·Trudee Fair
Mar 8, 2012·Reproduction, Fertility, and Development·Tom P FlemingJudith J Eckert
Mar 8, 2012·Reproduction, Fertility, and Development·Alexander C O Evans, Siobhan W Walsh
Mar 8, 2012·Reproduction, Fertility, and Development·M G DiskinD G Morris
Jan 19, 2013·Reproduction, Fertility, and Development·Silvia C ModinaAlberto M Luciano
Apr 1, 2014·Animal : an International Journal of Animal Bioscience·M A CroweE J Williams
May 23, 2014·Animal : an International Journal of Animal Bioscience·J K Drackley, F C Cardoso
May 23, 2014·Animal : an International Journal of Animal Bioscience·S T Butler
Jun 17, 2011·Animal Reproduction Science·M A Velazquez
Aug 1, 2012·Reproduction in Domestic Animals = Zuchthygiene·D C Wathes
Aug 1, 2012·Reproduction in Domestic Animals = Zuchthygiene·J H Hernandez-MedranoR Webb
Sep 1, 2010·Reproduction in Domestic Animals = Zuchthygiene·W W ThatcherC R Staples
Dec 24, 2013·Journal of Dairy Science·L F FerrarettoM C Wiltbank
Jan 25, 2011·Animal Reproduction Science·S W WalshA C O Evans
Oct 22, 2013·Animal Reproduction Science·E M HomerP C Garnsworthy
Aug 29, 2012·Journal of Theoretical Biology·Stephen R PringPhilip C Garnsworthy
Sep 20, 2011·Theriogenology·William ThatcherCharles R Staples
Feb 29, 2016·Reproduction, Fertility, and Development·Denise LaskowskiRenée Båge
Feb 1, 2015·Reproduction, Fertility, and Development·M G DiskinD A Kenny
Apr 2, 2018·Journal of Dairy Science·R M RodneyI J Lean
Jul 8, 2020·Animals : an Open Access Journal From MDPI·Junnan MaAriette T M van Knegsel
Sep 22, 2020·International Journal of Veterinary Science and Medicine·W KaewlamunA A Ponter
Jan 1, 2016·Reproduction, Fertility, and Development·Roberto SartoriMilo C Wiltbank

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