Wat joslynn said. Just found out today I'm having a baby girl through the the blood test result (:
My doctor did a blood test called the Harmony Tesr. They can do it starting after 10 weeks. It also test for down syndrome and edwards syndrome. I got my results back within 2 weeks. Found out I'm having a little girl and low risk for down syndrome and edwards syndrome. My insurance covered the test. Good luck:)
They can determine the sex through a blood test but its up to your dr and your insurance.