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Developmental competence of porcine blastocysts produced in vitro Kikuchi KJ Reprod Dev 2004[Feb]; 50 (1): 21-8The establishment of in vitro embryo production (IVP) system in pigs enables us to generate viable embryos with a quality equal to that of in vivo derived embryos. This technology contributes not only to developments in reproductive physiology and agriculture but also to biotechnologies for producing cloned or genetically modified pigs. The birth of piglets from in vitro matured and fertilized embryos at the two- to 4-cell stage was first achieved about 10 years ago, but it was only quite recently that piglets were produced after the transfer of IVP blastocysts. This improvement to the blastocyst stage of the in vitro culture system after in vitro maturation and fertilization can be expected to play a part in the development of an advanced IVP system. Here, we discuss the developmental ability of porcine embryos produced by our improved IVP system and the utilization of this technique in the new biotechnology.|*Embryo Transfer[MESH]|*Swine[MESH]|Animals[MESH]|Biotechnology[MESH]|Blastocyst/*physiology[MESH]|Female[MESH]|Fertilization in Vitro/*methods[MESH]|In Vitro Techniques[MESH] |
