DS always measured spot on, with every single ultrasound we had, in every measurement they took. Perfectly average, although when he was actually born some of his measurements were slightly too small or slightly too big.

DD1 usually measured on point with everything but her head. Her head was always a few "weeks" ahead, and threw off her average. Even now, her head is bigger than the average 3yo head

DD2 measured two weeks ahead at all three (?) ultrasounds we had, and her/our fundal measurements kept that consistency up as well. Now she's still a little ahead of the curve. As with DD1, big head. Lucky me, I make little fatheads