| Popis: |
To better define the environmental conditions required for the development of early cleavage stage pig embryos, one- and two-cell embryos were transferred to the ligated oviducts of anestrous sheep (n=6) for four days. The recovery rate was 83% (54/65), and of those recovered 72% (39/54) developed to the compact morula or blastocyst stage. Two suitably synchronized recipient gilts received 8 or 16 embryos. The gilt receiving 8 embryos aborted one fetus after 32 d of gestation, whereas the gilt receiving 16 embryos gave birth to 8 normal piglets. Thus, it is concluded that the requirements for early development of pig embryos are met by the sheep oviduct. |
