"Answer: they don’t..."
Actually, they do. It should be incredibly rare, but it happens more than we would like to think.
A quick read for you, going back to the 2016 debates, but I think the fundamentals of the issue have not changed since then: https://thehill.com/blogs/pundits-blog/presidential-campaign/302232-nearly-13000-late-term-abortions-happen-every-year-a/
Keep in mind the political leanings of this web site (something you'll never hear a lib say) when reading this. What I like to do is check multiple sources (and let's make sure not all of them are "media" sources) with that perspective in mind. The right wing sources won't tell you things that the left wing sources will and vice versa. Do that often enough, ignoring the obvious bias (which you may have to train yourself to look for... I know I did) and one starts to get a better, more complete picture of what's going on.