Dear Natasha Birt:
I am sorry that you are in such a difficult situation. As I am sure you know, the issue of terminating a pregnancy is a very personal issue, and one that is very political in some parts of the world, meaning people feel intensely about the issue- for or against it.
I will tell you what I would personally do if I was in your situation as you described it: I would safely terminate the pregnancy as soon as possible. That would be my choice because the world as it is- is a harsh world for any new arrival, but for a child to arrive to a father who never wanted him, who has health issues and is unable to parent him well, and perhaps to an overwhelmed single mother (and therefore, not having a single parent who is calm and able to parent well)- these are extra harsh conditions that add to the harsh world overall that is awaiting the potential new arrival.
anita