please can anyone tell me there is any way to export shape keys with modifiers from blender to unreal ? with out modifiers my mesh not look good plz help me and I having a problem with new version of UE4.10.4 when I import file from blender its freeze and not crash after long time I close with task manager , is that problem with newer version of UE4.10.4 or I have to reinstall UE4 please answer me thank you 
Apparently it should be working.Make sure that you have the latest version of Blender and check out the export options in the FBX export plugin. I think other formats don’t support shape keys.
thank you so much for answering me Andrei , yes i have all latest versions of blender and ue4 but maybe some problem with visual studio so i reinstall every thing and also redesign my mesh i mean i apply subsurface modifier then again make shape key its solve my problem ,yes it take my time but its ok i m new on blender and ue4 , anyway thank you so much, take care