Spontaneous abortion is the term you are looking for, if it happens naturally. There is another term I forget if it is medically induced, which is not the same as being cut out.I’m not even talking about abortion here, & I can see people trying to debate the above comment getting hung up on the term person…. that’s not relevant, but what is relevant would be the term life.
A fetus in the womb is potential, whether that womb is in a person or a giraffe. The species is not relevant.
If the fetus isn’t “alive” then it can’t die if it was never alive. If something happens to make that fetus transition from viable to non-viable and no longer a potential life form….is this just semantics in terms or language (?) simplified by using the terms alive vs not alive or dead (?) correctly or not? Does this question make sense?
If the entity in the womb loses the potential to become a viable “living” member of whatever the species the owner of that womb is…. What do you call that change of state??
Cells in the body die on a regular basis, and I think this has another name as well.