My 2nd
pregnancy was a blighted ovum, I had an
early scan at 6+ weeks as I lost my first baby at 16 weeks and they were keeping an eye on me, at the first scan only the gest sac was seen, at the 2nd scan 2 weeks later when i should have been 8+ weeks, there was no development at all in the size of the gest sac, no yolk sac or hb detected either. You are still fairly early on though, there is hope yet!