The precision of foetal age to predict lambing date

Susan Robertson; Belinda King; Michael Friend

The precision of foetal age to predict lambing date

Susan Robertson, Belinda King, Michael Friend

Research output: Other contribution to conference › Poster › peer-review

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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 language	English
Pages	57
Number of pages	1
Publication status	Published - 2012
Event	Joint Conference of the New Zealand and Australian Societies of Animal Production (NZASAP) - Lincoln University, Christchurch, New Zealand, New Zealand Duration: 02 Jul 2012 → 05 Jul 2012

Conference

Conference	Joint Conference of the New Zealand and Australian Societies of Animal Production (NZASAP)
Country/Territory	New Zealand
Period	02/07/12 → 05/07/12

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ASAP2012 fetal agingAccepted author manuscript, 39 KB

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title = "The precision of foetal age to predict lambing date",

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.",

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author = "Susan Robertson and Belinda King and Michael Friend",

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AU - King, Belinda

AU - Friend, Michael

N1 - Imported on 03 May 2017 - DigiTool details were: publisher = Australia: Australian Society of Animal Production, 2012. editor/s (773b) = MA Friend and GL Krebs; Event dates (773o) = 2-5 July 2012; Parent title (773t) = Joint Conference of the New Zealand and Australian Societies of Animal Production (NZASAP).

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N2 - 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.

AB - 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.

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M3 - Poster

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T2 - Joint Conference of the New Zealand and Australian Societies of Animal Production (NZASAP)

Y2 - 2 July 2012 through 5 July 2012

ER -

The precision of foetal age to predict lambing date

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