I would honestly save your money. The gender/DNA blood tests that promise to tell you the gender of baby as well as if the baby is "normal" is nothing but a scam. There are a lot of stories online about women who have been scammed out of a lot of $$$. One lab tech told a woman her baby had Downs Syndrome at 6 weeks week gestation and was a baby boy. Thw woman was crushed and almost had an abortion. She waited until her 20 week ultrasound to find out the baby was a girl. Her CVS proved the baby was healthy and "normal"
I also did the gender blood test as well as intelligender. All said I was having a boy . I had 3 U/S and my baby is all GIRL. I am a nurse and I work with a master lab tech. She said there is no way possible to tell the gender of your baby or if the baby has any chromosome problems by taking your blood. Your blood does not mix with the blood of your baby. If it did mix, your body's immune system would attack and kill the fetus.
The only way to find out the sex of your baby is to wait for the U/S or have a CVS/ ammniocentisis done. The CVS is done around week 10. Hope that helps :)