How accurate was the blood test in determining the baby's gender?

Janelle
So I had the blood test done at 12 weeks and they told me baby was probably a girl. I went in for my anatomy ultrasound and baby wouldn't move so they couldn't check the gender. They're not scheduling me for another bc other than that they could see everything they needed to. My question is should I trust the blood test and go off of that? Has anyone ever had the blood test be wrong?