Blood test for genders?

Madison💁🏼‍♀️ • Retailer// Married 6 yrs// Mommy to fraternal twin girls// surprise baby on the way!
Ive been seeing a lot of talk about the blood tests (I think one is called verifi, and there are probably a couple like it out there too) that screen for chromosomal abnormalities but they also give you the baby's gender.
My question: does this work on twins to give you the genders? If so, we could find out definitively at 12 weeks!