What ultrasound is more accurate ?

Question

At my first ultrasound I was dated at 6 weeks 5 days CRL .81 cm.... I had another one at 25 weeks 5 days and Baby measured a whole week ahead. He weighed bigger too at 2.15. Does this change conception or is he just bigger?  Because I think that puts me back far before my period that I would have gotten pregnant. My due date wasn't changed at all tho.

Answer

I was told first scan in first trimester is most accurate since babies grow at different rates after the first tri

Answer

First trimester scans....after 12w babies all grow at different rates and typically doesn't change due date...

Answer

When they say your baby is measuring smaller or bigger than it is supposed to be, it is not meant to change your due date, just inform you of the growth of the baby
 If your baby is measuring a week ahead then your baby is growing well. From a health perspective, it could be either you have diabetes, or you smoke. But it could be neither. Every little thing is gunna be alright. ;)

Answer

I'm also a week ahead, and she is bigger! Due Date didn't change, and doc said early ultrasounds are more accurate :) but me and my hubby are both tall, so I'm not surprised :)

Answer

My OB only changes due dates if it's off by more than a week.

Answer

My midwife only changes due dates based on dating ultrasounds done between 8 and 10 weeks

What ultrasound is more accurate ?

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