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

R. A. Gustafson, G. B. Anderson, Robert Bondurant, G. R. Sasser

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)267-273
Number of pages7
JournalJournal of Reproduction and Fertility
Issue number1
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • Physiology
  • Embryology
  • Molecular Biology
  • Obstetrics and Gynecology
  • Developmental Biology


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