Conventional embryo collection is the foundation of the ET industry and relies on natural in vivo processes, using the donor cow as the culture system. Conventionally produced embryos typically offer more consistent and higher conception rates at a lower price point.
This process takes approximately 17 to 31 days to complete and requires a greater quantity of semen, but can be less effective if trying to control gender. As a result, many clients choose this option when their goal is to mass-produce embryos of either gender across a larger donor population.
We have observed improved post-collection breeding success in conventional donors when using the 7&7 synchronization protocol, particularly when initiated at or within a few days of collection. Even with these improvements, cows that undergo conventional collections will most often calve later in the year following their collection(s).
Average embryo collections result in 6-7 viable embryos per event.