Does anyone have any advice/ experience with an abnormal ultrasound measurement?? We had our 20 week anatomy scan tonight and our baby's nasal bone was not measuring correctly, which they told us could mean a possible chromosomal abnormality. We did not do any genetic testing in the beginning and now we are being told maybe we should go for more testing. Has anyone been told this, but it was just a scare? How accurate can this measurement be in diagnosing a chromosomal abnormality? Please help!