The precision of foetal age to predict lambing date

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Abstract

Experiments often require the identification of ewes which will lamb during a specified time. Where the date of mating is unknown, foetal age can be estimated (Sergeev et al 1990). However, the prediction of foetal age entails a high degree of error, with Greenwood et al. (2002) reporting a 25% error if an accuracy of +/- 5 days was required, where a single measurement of metacarpal bone length was used. However, gestation in sheep can vary by 7 days (Sir and Bartlewski 2010), further contributing to error. Knowing the precision of foetal age as a means of estimating date of lambing would therefore be useful.
Original languageEnglish
Pages57
Number of pages1
Publication statusPublished - 2012
EventJoint Conference of the New Zealand and Australian Societies of Animal Production (NZASAP) - Lincoln University, Christchurch, New Zealand, New Zealand
Duration: 02 Jul 201205 Jul 2012

Conference

ConferenceJoint Conference of the New Zealand and Australian Societies of Animal Production (NZASAP)
CountryNew Zealand
Period02/07/1205/07/12

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    Robertson, S., King, B., & Friend, M. (2012). The precision of foetal age to predict lambing date. 57. Poster session presented at Joint Conference of the New Zealand and Australian Societies of Animal Production (NZASAP), New Zealand.