Need advice Double Bubble Sign.

We got sent for a special more in depth ultrasound and on that they saw a fetal double bubble in his stomach.

What I want to know is if anyone has had this and their child not have down syndrome. It's a 2 out of 3 chance our baby won't have it but I just want to know if anyone has had this happen to them or anything you can let me know.

We did blood work to test for down syndrome, cystic fibrosis, and a few other things but we won't find out for 10 days.

Thank you :)