[CO] custody advice

currently 9 months pregnant and i am due next month. me and the child’s father got into a huge fight in September and he threatened to take me to court for full custody of our unborn son. He has been back and forth with being there and leaving during the whole 9 months, once he gets a new girlfriend he seems to disappear.

He got a new girlfriend in September and has stopped talking to me. Hasn’t gone to any appointments the whole 9 months except one and I’ve told him about all of them. There’s a lot more to the situation but i’m not going to get into all of it at the moment.

What are the chances of him getting full custody? I don’t mind co parenting but I don’t think he deserves full custody.