May 4, 2006

Scientists discover way to freeze pig embryos
 

A method has been discovered to freeze and preserve pig embryos, thanks to US researchers from the University of Missouri-Columbia.

The researchers, led by Professor Randall Prather, said the embryos were obtained through in vitro techniques and carried modified genetic material. After thawing and transfer to a surrogate mother, some of the embryos went on to produce live piglets with new genetic traits.

The team said the discovery could be used to transport genetically enhanced swine in the form of embryos across the country and around the world.

High levels of lipids in embryo cells makes it difficult to freeze and preserve as it is sensitive to cold.

The team first removed lipids from unfertilised eggs before fertilising them with muscle cells from a male pig.

The resulting embryos were then frozen at the blastocyst stage.