Just wondering what this white part is above/beside the baby's head. When I got the ultrasound done the doctor said everything looked perfect. She didn't mention the white part and I didn't think to ask at the time. It didn't bother me until I watched a YouTube video where the woman in it said that there was a white line above her baby and the doctor said that it was indicative of a chromosomal abnormality. Unfortunately she had a miscarriage as a result of the abnormality. Well, I was just wondering if any of you might know what this is in my ultrasound. The yolk sack maybe?