While I do not practice in your state, a medical malpractice case in the U.S. is a difficult case to prove. Even if the person operating the ultrasound had been able to see everything and had told you at the time of the ultrasound, there are no damages to you. I am so sorry for your loss and cannot imagine the grief you and your wife must be experiencing. However, your child likely had this syndrome from conception, and nothing that any of the physicians did or did not do contributed to your injuries. This opinion is based upon the information you provided here and if there is something else that was not said in the synopsis you provided that you feel is important or the key to the case, such as whether a surgery could have been done with the child in utero to save the child? I don't know the answer to that question. I think a medical malpractice case with your facts would be extremely difficult if not impossible to prove. I wish you and your wife much healing after this difficult loss.