Is blood test for gender results 100% ??

yes

Okay making sure! I don't want to buy a bunch of boy stuff then later in my pregnancy find out its a girl lol @junebaby

the look at the DNA and it'll tell whether there are y chromosomes present.

that's how I found out and it was confirmed through ultrasound as well.

Okay good. I'm sure I will get confirmed on feb. 2nd so exciting :) @junebaby

it is exciting. we were going to wait but I gave in when she called with my results.