Harmony/NIPT test with twins

Samantha

My OB doesn’t think the Harmony test is accurate for twins and so isn’t keen for us to waste the money (I’m in Australia and have to pay $450 Aust for the test). He said it can’t accurately pick up two separate DNA despite them claiming to.

Has anyone had the test with twins? I really wanted the genetic testing for reassurance as I’m 39 (waiting to find out sex isn’t an issue).