n The Dairy Mail - Measuring dairy cow fertility : technology

Volume 17, Issue 8
  • ISSN : 1561-4301


Prof Keith Macmillan from the University of Melbourne believes the fertility levels of high-producing dairy cows, given sufficient time to recover from the energy demands of early lactation, have scarcely declined over the years. The genetic selection for increased milk yield has increased energy partitioning towards the udder by altering hormone balance. Rapidly mobilising body tissue in early lactation comes at a price - fertility rates may be held up while the cow recovers from the early lactation energy demands.

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