Hi Berube, from what I can see here:
http://help.autodesk.com/view/MAYAUL/2017/ENU/?guid=GUID-CE85B76E-EA98-4FB3-BAF1-99730CA3220B
it says Maya can import IGES, SAT and STEP formats. For curves I'd recommend IGES format since I think that's worked for others before.

But it looks like they've changed how imports work for the Maya 2017 version though, it used to be a plugin called "Direct Connect" and now it's one called ATF (Autodesk Translation Framework). I don't know if there are any new limitations in the new system.

- Michael