Sorry to hear your loss- my experience is as follows

My ob is a very experienced doctor. When she delivered my second baby, she found out the knot and baby's heartbeat was slowing down.

She asked me to sign the emergency C section agreement form. She told me if I cannot push out the baby in the next few minutes, she would need to have the emergency C section right away. Luckily, I was able to push out the baby on time.

I had no idea it was very critical condition until my hu*****and told me he was very very nervous when he saw the machine showed the baby's heartbeat was slowing down....

So, your OB maybe right, they cannot tell the knot from the ultrasound.  I had so many ultrasound with the specialist as well. If you are in ny, I would like to recommend my OB to you.

I cannot image how hard it is for you to lose you beautiful baby. It is heartbreaking. My thought is with you. Take good care of yourself.