HCG fluctuation

  I just went through an IVF/ICSI cycle with replacement on December 22 (3 embryos were replaced).  I had a positive pregnance test on January 2 and another on January 5.  On January 2 my Beta HCG was at 73; on the 5th it was at 248.  On January 11 I had an ultrasound and more bloodwork.  They saw a sack (hard to see) but the blood level was only at 366.  They re-tested on January 13 and the HCS was at 781.  I go back tomorrow (15th) for more bloodwork/ultrasound.  What do you think is going on?  Any hope?  
  
  Thanks for your guidance,
  Susan
Dear Susan:
An hCG level doubles every 2-3 days during the first 45 days of pregnancy. Using this rule, one would expect an inital level of 248 to approximate 2000 around January 11.
An ultrasound image 4 weeks from embryo transfer should show fetal growth with heart motion.
This information is provided for education purposes and is not a medical consultation. If you have specific questions, please contact your physician.
Keywords: hCG