that's the metaphor
??? Nothing about the game suggests it was an abortion unless perhaps it was a situation where the mother's life was in danger, but I don't remember any reference to such a thing. If your answer is "It was an abortion and these are metaphors," I think that is sidestepping the issue that metaphors are suppose to make sense.
Certainly, but you first encounter the certificate (which suggests neonatal death) is during the day! It only appears in a nightmare later. Also, genuinely almost everything in the game suggests neonatal death or maybe stillbirth, down to the climactic scene, which does not suggest the pregnancy was unwanted. I can't point to a single thing indicating that it was a choice, even a compelled one. Everything points to it being a health issue on the part of the fetus.
While I have your attention, I do want to commend that the second person camera in that one shot was an excellent call, though.