I know that not all women with twins have high HCG and not all high HCG levels mean twins. But, I think there is a trend in that direction. I went for a scan at what I thought was 6+5. The scan indicated I was only 5+5. Going back this week for a follow-up to make sure baby is growing appropriately. So somewhere right around week 6 (if you take the average of those dates) my HCG was 11,300. Also, based on that dating I got a +hpt at 7 dpo. What do you think? How does this compare to your 6 wk or so HCG? Would you worry about slow development or miscarriage with HCG levels this high?