What? I don’t get how people can frame questions this way and expect a meaningful answer. Are you fishing for goofy-logic-exposure from people in the way they think about human abortion?
Seems obvious to me that the answer to this, given enough alien races, would be “some do, some don’t”. Given not enough alien races (like, one), the answer is “I don’t know”.
I guess you’re asking what we think seems most logical or reasonable. Personally, I think terminating pregnancies or even about-to-be-born children or suffering newborns makes sense in some cases and should be entirely the decision of the mother. This because the life of the mother and the potential suffering of the child are very significant to me, and the killing of something that hasn’t lived outside a womb past day one is not particularly significant to me. Everyone dies. A life that just comes into an abstract womb existence and dream about stuff for some months and then dies, seems like a relatively good life. By that, I mean (for example) a better life than we give our food animals in industrial farms, which I have at least a thousand times more sympathy for because they suffer and have to endure much longer in a miserable state. And a better life than a human child kept alive by life support and surgeries and possibly suffering due to horrible defects. Human mothers almost universally have a massively sympathetic outlook towards their own even-unborn children. If even they feel it’s best to terminate the pregnancy, then in almost every case I would say that’s probably accurate and that there is no one who should have higher jurisdiction over that choice than the mother.