How to import/export hair guides as *.FBX Fur Splines

As the title says, how do I import/export hair guide splines as *.FBX Fur Splines from software like Blender, Max or Maya? Currently if I try export anything with hair, file is empty. if I export with converted hair to curves or mesh… I get errors or empty data. Thoretically I need triangles for the FBX to import/view correctly - but I only want splines grown from vertices.

Can someone please clarify how this workflow works? I really do want access to this data.