Differences in Fresh Versus Cryopreserved Embryos
For this post, we would like to discuss the different types of embryos that can be used for embryo transfer. Each embryo type has different pregnancy success rates, associated labor, and equipment requirements. This post we are going to discuss the differences in fresh versus cryopreserved embryos.
Fresh embryos are never frozen. These embryos are flushed directly from the donor uterus, transferred into a straw, and immediately placed in the recipient cow. This prevents the embryo from being damaged by the freezing process, leading to better pregnancy success compared to frozen embryos. However, to use this technique both the donor and recipient cows need to be worked on the same day. Thus, using embryos that are not flushed from herd donors is very difficult to achieve.
Cryopreserved (frozen) embryos have lower pregnancy success rates compared to fresh embryos. However, this technology allows producers to introduce genetics from cattle across the world. The purchase and use of cryopreserved embryos should lead to a more valuable calf crop. This makes cryopreserved embryos a great option for producers who want to use their cows as recipients only while increase calf value and introducing new genetics.