Im measuring roughly 4 weeks bigger by fundal height but when i went for my 4d scan his tummy and head was measuring about a week bigger.. They told me its because im on my 3rd baby, Not sure if this is true? Mine is still breech and i hope to god he turns! lol

I had a growth scan at 30 weeks and the babies abdomen was measuring 36 weeks?! and my fundal height has always been at least 4 weeks ahead, it was 5 today at an appt. They reckoned my baby was 6 and a half pounds at 30 weeks...first thing I said was, "could my dates be wrong?" and they said no, definetly not..just a big baby!

I believe that after 20 weeks its unusual for them to change your dates, as babies grow at different rates after that time, so it sounds like you are just having a bigger baby

My sister, with her 3rd, measured 8 weeks early from about 30 weeks on. She had him at 39 weeks and he was almost 10 lbs!