M.P.
My son is 16 months old, and we have gone through the same thing. I think it started at about 9-10 months. He only bites me when he is teething, but he still does it to get my attention. I tell him "No Bite," and walk away for a minute. I will then come back with something for him to chew on other than Mommy. It upsets him that I walk away since he was trying to get my attention by biting me. I want my kids to learn that they can get my attention by positive behaviors, and praise them (a lot!) for doing so.