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Failure of sheep-goat hybrid conceptuses to develop to term in sheep-goat chimaeras



Failure of sheep-goat hybrid conceptuses to develop to term in sheep-goat chimaeras



Journal of Reproduction and Fertility 99(1): 267-273



Six hybrid pregnancies were established: three in sheep-goat chimaeras, one in a sheep-(sheep-goat)hybrid chimaera and two in does. Pregnancies were monitored weekly by ultrasonography and peripheral concentrations of pregnancy specific protein B (PSPB) were measured. Placental development as detected by ultrasonography appeared to be slower in hybrid-in-goat pregnancies than in hybrid-in-chimaera pregnancies, although this difference was not reflected in PSPB concentrations. Time of fetal death could not be predicted from PSPB concentrations. Chimaeras appeared to carry hybrid pregnancies longer than ewes and does usually carry hybrid pregnancies, but none was carried to term.

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Accession: 009847798

Download citation: RISBibTeXText

PMID: 7506792

DOI: 10.1530/jrf.0.0990267


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