Generally when people say "abortion" they mean a medical procedure, not "spontaneous abortion," and this doesn't appear to be that.
While the use of the passive voice makes the cause ambiguous, I think it is much more likely they mean the pregnancy was terminated voluntarily.
I should have known just from not even recognizing the word that any word this long and this obscure for a medical condition means something absolutely horrific. It's this:
Ver archivo adjunto 5922012
Anyone who wants to force someone to carry something like this to term uselessly is an absolute monster.
In this case the "cranio" part means it also comes with a side order of our old friend anencephaly.