At present, reproductive biotechnologies are widely used for farm animal breeding. In cattle methods such as artificial insemination or superovulation and embryo transfer are generally employed, because they allow us to utilize the genetic potential of male and female animals more effectively. The
in vitro production of embryos from oocytes of genetically highly valuable donors eliminated from breeding because of reproductive disorders can accelerate genetic progress. However, this requires an increase in the efficiency of usable oocyte collection, transferable embryo production and embryo