The reproductive performance of New Zealand dairy cows after induction of calving

Authors: Moller K, MacDiarmid SC
Publication: New Zealand Veterinary Journal, Volume 29, Issue 10, pp 172-173, Oct 1981
Publisher: Taylor and Francis

Animal type: Cattle, Livestock, Production animal, Ruminant
Subject Terms: Oestrus/oestrous, Reproduction - female, Reproduction, Parasites - internal, Parturition, Parturition - induced, Reproduction - hormones
Article class: Scientific Article

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Abstract: Induction of premature calving contributes to subsequent failure of some dairy cows to become pregnant and calve. Of a sample of 276 cows 16.7% failed to calve the following year despite the occurrence of oestrus relatively early after calving, and several matings. The cows which did conceive had a normal first-mating calving rate of 53.9%, requiring 1.7 matings per pregnancy. Two of the 18 survey herds under consideration suffered lengthy calving-to-first-mating oestrus intervals, presumably because the induced cows were in poor condition at the time of calving.

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