My daughter is 36 weeks pregnant with a son. She had an ultrasound at 12 wks, 21 wks and 30 wks. All was perfect with baby. Last week she had an ultrasound and they were not able to measure the heart accurately. Had another ultrasound by specialist yesterday and was told the right side of the heart was slightly larger than the left side. Dr. said this was quite common but they would be gettinging a cardiologist to review the ultasound results. My daughter is panicking that it could be HLHS as that is all she could find on the internet. Is there another reason why the right side of the fetal heart would be slightly larger than the left?