Ellie - i don't want to get shot down for saying this... but is it possible the embryo is still viable? I mean my bubba didn't have a HB till 8 weeks...

ETA - How sad would it be if you got a D&C but really the embryo was fine? But i'm sure your FS would know more than I!

Sounds simillar to what i said huh! I definately wouldn't be diving into a D&C until you know for absolutely sure... Imagined if you had a D&C and it was infact a viable pregnancy.