I know this is a probably a stupid question and I know 'all babies are different' but my friend had a scan at 12 weeks and the crown to rump length was 10cm, I had mine at 12w5d and mine was 6.3cm. 4cm seems like a huge difference when they are that small. and at my 19 week scan the measurements all came up as 17 weeks and there was one at late 16 weeks.
My dates are 100% accurate.
Can someone tell me this is normal?
Thanks in advance.