Earlier this week Union's husband Dwayne Wade had opened up to Ellen DeGeneres about the pride he felt for his child.
Ash Lammin has believed she was born in the wrong body since the age of three.
When faced with the statement: “I would feel proud to have an LGBT child”, 26% of those polled disagreed.
A judge awarded joint custody to a mother and father in Texas, US, despite their extremely different views regarding their child's gender identity.
The policy has been brought into the spotlight after a transgender woman sought advice ahead of her visit.