gender blood test

okay, so i went in for and ultrasound at 12w5d and Dr said she could see i was having a boy!!!! (mommy of a gorgeous 18mnth baby girl) but i still had blood drawn to know the gender, so question is how many of you have had the blood test to know gender and it was accurate!?? haven't told husband he's been wanting a boy since our first (even though daughter has him wrapped around her finger😊) so i just want to wait for the results to come back to be 100% sure it's a boy..