My scans were all exactly on par and then the 24w scan said the baby was 10 days behind or something. I was worried about that but my OBGY said US aren't always correct and it didn't mean anything. He did a quick scan in his office and said the baby actually looked bigger then 24 weeks! Don't babies grow in spurts anyway? Try not to worry sweet. If you are still worried, ask for a growth scan at your next US