I know there is a starting point as to when you can first do an ultrasound (26 days?) but can you do it at any point after that?
I've always heard the earliest was 28 days. I've also heard 32 days is better. I would ask the vet doing the ultrasound when they recommend doing it or look for a repro's recommendation.
Remember, embryos float 10 to 21 da. after fertilizaton before implantation. If the embryos implanted on the later end of that time frame, you might not see as much as you would like to at day 28. I'm not talking about counting embryos, I assume you want to confirm pregnancy.
