I think the main point is not who suffers, but who cares and why. We have a lot of people suffering around due to lots of reasons, but don't actually care to fix that. E.g. "abortion" after birth is biologically rejected by many, because it completely contradicts the evolutional efforts of a group to survive and reproduce. That's why children make many of us happy — if you're not happy or careful enough, then they're quickly dead, and your group is dead. Other animals have different strategies, from having hundreds of children to being pregnant for years, so child is ready to fall to the ground and go travel in five minutes.

Suffering has nothing to do with it, it's just a biological motivator for both parent and child to escape pre-reproduction death with insignificant side-effects like really, really missing a nice car or just an ice cream.

But while this topic is naturally highly dependent on "local" social rules, I think modern society should put responsibility and planning on the first place. If someone is not very sure that s/he can raise, care of, or simply enjoy the parenthood, it must be okay to abort it, unless that overweights all imaginable social programs. Like killing born children, for one. With modern society atomization and precision, abortion absolutely falls into "not your business" category in most places, unless one has very conservative and/or intrusive religious views, which is a bad thing itself, given how many completely different minds have to interact now on daily basis.