I was recently told that the most accurate time for dating was at 12 weeks scan (offered based off LMP) because before this they may measure smaller but have a growth spurt and catch up.
The early scans are lovely for the reassurance that baby is developing but I think the purpose isn't necessarily dating the pregnancy and therefore I'd wait for the 12 week scan for more accuracy xo
Hi! I know someone that got dated like this and in the next scan (2 weeks later) the baby caught up. They are just so small at this stage and can be hard to date or measure. Wouldn’t worry if baby is all good :)