6 / 24 i t is important to use the best fe- males in the breeding scheme and in this way optimize the genetic progress. therefore, we do embryo transfer (et) in the best females from the individual breeds so they will par- ent more progeny. in et, the donor will be treated with hormones so that she will release more eggs. the donor will be inseminated and on the eighth day, the embryos will be flushed out and transferred to a recipient/surro- gate. as a supplement to et, it is now possible to do