19 / 28 19 december 2017 | vikingnews the success rate for frozen embryos is around 50-60%, around the same rate as for conventional insemina- tion with semen. as noted before, finland is one of the top countries for embryo flushing; on average, we obtain seven embryos per heifer per flushing, which, by international standards, is an extremely good re- sult for red breeds and holstein. we perform embryo flushing every week at all our viking country stations. cooling process cleaning the embryos by anders fogh, the nordic cattle genetic evaluation (nav) t he difference in health between heifers with high and low