HcG levels Okay so I had my HcG tested every 48hrs for the last week. My first test was 26 which is "an acceptable number". The Doctor was hoping for a 39 from yesterday's test, which would have been a 50% increase in 48hours. I got a 67!!!!!! That is a 158% increase!!! We are only 4.5 weeks along and I know it is early but if your HCG increases that fast, does it mean it could be twins?