I don't anymore - I wouldn't want both of us to be upset when it can just be me. There's no point. I did in my previous cycles, and it upset us both when the tests came back negative (last cycle we were thrilled as we had a faint bfp which turned into a chemical)
If I see a faint line on a test now, I'll tell him but I don't tell him when I'm about to do a test x