The in vitro production of porcine embryos has presented numerous challenges to
researchers over the past four decades. Some of the problems encountered were specific to
porcine gametes and embryos and needed the concerted efforts of many to overcome.
Gradually, porcine embryo in vitro production systems became more reliable and acceptable
rates of blastocyst formation were achieved. Despite the significant improvements, the
problem of polyspermic fertilization has still not been adequately resolved and the embryo in …