Adding to this: If you do not want to reference the current gender, you can also use "Assigned Female at Birth" (AFAB), or "Assigned Male at Birth" (AMAB).

This is useful when clarifying terms, when you do not know the persons identity, or when discussing groups based on the factory default settings.

A female or male is not 'assigned' anything. Just because you are confused about biological reality doesn't mean it doesn't exist.

Yep. :)