I had my beta exactly after 14 days after extraction. I had a BFN. It is hard to wait but to be sure I didn't take a HP because I didn't want to get my hopes up just in case it was wrong.
Good Luck!
I had my first beta done on my #2ivf exactly 8 days later (last Wednesday) and it was BFP but today I had my 2nd beta and it went down, so I had a chemical pr. Anyway Lil Dubb, I think it depends on how old your embryos are 3 day embryos are tested 10 to 12 day and blastocyst 5 day embryos are 8 to 10 day tested. At least that is how my RE works...I hope this helps.