If you're making straight semen to breed cows, Nichols makes good clean units. If you're making sexed semen, keep in mind that they do not sort it in house, or at least last I knew they didn't. It's still top tier stuff though. The sexed 4 mill units coming out of ST Genetics are some of the best units available.

Discussing embryos requires a deeper dive than most people are willing to entertain. Keep in mind IVF production can be very animal specific. There is decades of data out there on semen success rates. It not only varies from animal to animal, but collection to collection. There is a reason why semen from one collection code might bring a $1,000 and the rest of the codes might bring $200. On the other side, ever wonder why a guy has 6 female clones, sells three of them, and then 5 years later the calf records in the database show he really only used one of them? The better question is, can you get your hands on any of the data with regard to the animals you're wanting to use? Most people can't.

Reception rates can also be very animal specific from both ends, but they're nearly always related to how far you're willing to go to create a healthy egg and an optimum environment for reception. Most people aren't willing to do what it takes to accomplish this and most eggs purchases are a completely blind transaction. That's an endless list of unknown variables that all have an impact on success rates and now we're narrowing it down to a random number. Generally speaking, conventional embryos should have higher conception rates than IVF eggs. I'd say it varies from 10% to 40%.

A lot of people are wasting a whole lot of money with half ass attempts at replication while some people are successfully shaving a whole human generation off their breeding program. As with just about everything, education and effort go a long way and some of the education can only come from experience.