I have used TransOva, Boviteq, and Vittelle. TransOva & Boviteq use either conventional or IVF. Vittelle is only IVF. I have found that conventional embryos are "stickier" than IVF. Conventional flushes require more straws of semen and sexed semen if you are trying to create heifers, whereas IVF allows you to use 1 straw of semen (either sexed or reverse sorted) for the flush. Also, with IVF you don't have to use drugs, where with a conventional flush you have to use a progression of drugs. With IVF, you don't have to "set up" your donor before a flush and you can flush her every 2 weeks. Why did you choose Deadwood...just curious.