My wife tested positive after an IVF done 1st December 2008, today is Tuesday 13th January 2009, and we both went to hear the heart beat using vaginal ultrasound but nothing heard! The sack measured 11mm with good placenta blood flow, we can see the yoke sack, and the doctor was concerned and asked us to return next Saturday 17th for a final test. This means that its 6 weeks plus 5 days since her IVF was done. Any hope?