she meant 2 days *later than a five day transfer*, not
two days after transfer. At least, that is how I read it. (But I did have to read it twice!

) That's my guess, though!
But, either way, betas are set off of day of conception, not day of transfer, I believe. I am really surprised that the RE did not say when to come back for a beta.
Good luck!
Sara H.