but for him, 1) space for him to miss you, 2) space for him to know that things are happening with you that he doesn't know 3) space for you to start new things so that when you contact him-- or when he hears from others about you-- he will be intrigued.
messages about the baby, r talk, etc could really inhibit some of the above things.
also, i think you should let him ask about the baby first.
you've got to promise me no initiation of contact for a month!!! then after that you can change if you want.