Sorry, came back.
I can't for the life of me see any reason why anyone would think this man has been anything but a total sod to say this. This ain't really an AIBU thread. You are not being unreasonable, don't have an abortion, don't tolerate any drip-drip, don't put up with any shit which suggests this is even an option. Just don't. Saying what he did was utterly wrong.
But what the OP has said here, that she is feeling so low and unwanted, that she fears he won't love their next kid. I don't see how pointing out that his statements mean he is trying to take over her body, he is using her as a baby machine, help in that, since I don't think that is all he feels. I don't see how declaring he is a total shit generally helps. I don't see what that offers her.
She loves this guy, she has decided to have four children and spend her life with him, she hasn't said anything about him pressuring her to have kids, controlling her body, acting like a total sod in any other way. She seems to want him around in the future.
And if that's going to happen he needs to apologise for saying what he did, explain why he knows he was wrong (which I assume he does), and try to find a way of explaining whatever he feels which would explain why he is not simply a total shit without seeming to justify it. And when he does that, as I really think he will since I just don't think most people are totals shits, OP will have to be the bravest and calmest human being around to cope with it and find a way forward.
And hundreds of posts telling her what she knows already which is that he was wrong ain't going to help either of them do that and get on with their lives together.
No excuses, no justifications, just recognition that something else might be there and that their family needs it sorted.