Blood Test because 35

Adriana • Mama of three 👦🏻👧🏻👶🏻 expecting number 4 🤪🤪 in May 2020 🤰🏻

Hey all. I’m 6 weeks prego and when I talked to my nurse via a phone appointment she said I would have to have some blood tests at my first appointment because I’m 35 and that they would be able to tell the baby’s gender based on the test. Wondering if anyone has found out gender through blood?