Obligations?

So the father of my child cheated, so I left. We weren't good together, and I was finally starting to see that.

However, ever since he's had a total temper tantrum about us breaking up, accusing me of being the one cheating because of how i reacted to his cheating, and said that someone else is my baby's dad I told him that anything else would have to go through a third party. Mostly to keep my headache and stress levels from dealing with him down and because I was hurt but I don't want my actions to keep him from his child.

So the third party reminds him of any doctor's appointments which he ignores and reminds him to pay his furniture bill since they keep calling about it. He's completely ignored it, and me when I texted him to tell him of a doctor's appointment.

Since he's been MIA and unresponsive to everyone, am I obligated to tell him when the baby is born if he keeps being unresponsive?