title: Transfer of frozen-thawed embryos in sheep.
abstract: Embryos collected from ewes six days after oestrus were frozen in straws using ethylene-glycol as a cryoprotectant. The efficiency of the simplified freezing and thawing procedure was assessed after transfer, which resulted in an overall survival rate of 58.3 per cent. Forty-two lambs were born from 72 frozen embryos which had been transferred without any attempt to evaluate them after the thawing and sucrose dilution process.
mesh_terms: D000818:Animals; D004624:Embryo Transfer / Q000662:veterinary*; D005260:Female; D005615:Freezing; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000502:physiology*; D012756:Sheep / Q000502:physiology*; D014021:Tissue Preservation / Q000662:veterinary*