Abaqus - Output - Current area from solid mesh face

Hi every one.

is there any way to request the current area (field or history output) from a solid face?

I was looking for in the documentation but I don't see any variable and from scripting, mesh face array object doesn't have getArea method or getSize or similar. 

I'm simulating a tensile test of specimen and I'd like to know the cross sectional area evolution.

Thanks in advance

Abaqus ​​​​​​​