For those of you who have followed your hcg numbers, have they been similar across your different pregnancies? Mine have always been pretty typical/average, say 400 at 17 dpo. Except for this time--I got 2000 at 15 dpo and 4100 at 17 dpo. I'm glad the number is doubling, but I'm puzzled why it's so high. I know I can't do anything but wait until the ultrasound next week, but I'm curious as to whether anyone else has experienced something similar. This is my 5th pregnancy I have followed the early numbers for, so it is definitely different this time!