gender blood test

Rosa • Happily married 💍💎 Mommy to a princess 👑👧🏻 Rainbow baby due in August 🌈👶🏻
I'm about 5 weeks pregnant. My doctor said at 10 weeks I can have the blood work done with that being said we can find out the baby's gender. How many have done it and do y'all recommend it or just waiting to till an ultrasound to know the gender.