Quality of embryos produced from dairy cows fed whole flaxseed and the success of embryo transfer

Journal of Dairy Science
H V PetitP Sharpe

Abstract

The objective of the experiment was to determine the effects of fat supplementation on embryo quality of dairy cows and the subsequent success of embryo transfer into recipient heifers fed the same sources of fat. A total of 30 lactating Holstein cows were allotted on d 18 postpartum to 2 groups of 15 donor cows blocked for similar calving dates. Total mixed diets based on silage and fat supplements were fed for ad libitum intake. On a dry matter basis, diets fed to donor cows contained 7.9% whole flaxseed or 2.8% calcium salts of palm oil and those fed to recipient heifers contained 11.4% whole flaxseed or 4.2% calcium salts of palm oil. The experiment with donor cows was carried out between d 18 and 109 of lactation. The experimental diets were fed to 121 recipient heifers from wk 8 before estrus synchronization and superovulation to d 50 of gestation. Dietary fat fed to donor cows had no effect on the number of viable embryos per cow (3.7 +/- 0.5), the number of degenerated embryos per cow (1.8 +/- 0.4), or the number of unfertilized oocytes per cow (2.1 +/- 0.8). But feeding flaxseed decreased fertilization rate (64.3 vs. 78.4%) and the percentage of grade 1 to 2 embryos (56.5 vs. 74.1%) and increased the embryo degeneratio...Continue Reading

References

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Jul 15, 2006·Journal of Dairy Science·D J AmbroseP Zalkovic

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Citations

Dec 17, 2009·Human Reproduction·J L M R LeroyP E J Bols
Nov 25, 2014·Nature Cell Biology·Manuel ViottiAnna-Katerina Hadjantonakis
May 10, 2013·Reproduction, Fertility, and Development·Monique M GuardieiroRoberto Sartori
Jan 1, 2019·Reproduction, Fertility, and Development·M MikkolaJ Taponen
Mar 4, 2011·Reproduction in Domestic Animals = Zuchthygiene·M LapaR M Pereira

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