Finding out baby gender

Alexia • Baby #1 on the way. First pregnancy. But very excited, nervous but so blessed . Praying for a healthy baby. Heartbeat was 174 and now it’s 160 expecting a baby boy and I’m due Dec 5th

I was reading that you can find out the baby gender sooner then 4 months by the Ramzi Theory or the blood test. How soon did you find out the gender of your baby by blood test...because I’m thinking that’s what I’m going to do.