Artificial Breeding Services [ Sheep Embryo Transfer ]

Sheep Embryo Transfer - The Basics

Embryo transfer in sheep has become a powerful tool to improve and multiply superior genetics in both stud and commercial animals. It has also proven a very popular way of trading in genetics worldwide. By means of freezing or chilling methods embryos can be transported or stored and implanted in other locations.

The process involves selecting donor ewes and rams of good genetics and sound fertility. These animals need to go into a positive management program to produce a good number of quality embryos. The ewes will be treated with a follicle stimulating hormone to induce multiple ovulations.

• The ova will be fertilized by insemination with the semen of selected sires.
  
  
• The fertilized embryos will be collected from the donor ewes surgically five or six days after insemination. The donor ewes can produce an average of eight to ten viable embryos.
  
  
• The fertilized embryos can be transferred fresh into recipient ewes, can be chilled to implant the next day or get frozen for storage and later implantation.
  
  
• Recipient ewes can be of any sheep breed or crossbreds and need to be selected for a sound fertility history. Recipient ewes will be synchronized for the implantation.
  
  
• Donor ewes can be collected every six to eight weeks to produce a large number of embryos. The increased number of lambs will be a great selection tool.

Embryo movement also provides a humane alternative to the stressful methods of transporting live animals. Research has shown this method of moving genetic material can be very safe with regard to preventing the introduction of infectious diseases into clean populations.

Dr Francois Marais