I was trying to think of the other movie this thread reminded me of:
I haven't seen the entire film, as I think it was released in the UK and I've only seen clips but have read the synopsis and a few reviews.
In it, the main characters are sweethearts from childhood, but before they can marry, Tommy is tragically killed. If I remember correctly, he was also an only child, so you can imagine the grief this causes his parents.
With the parents' consent, Tommy's DNA is cloned and Rebecca volunteers to carry the child. I know this is just a work of fiction, but in this case, the fertilized clone is placed into a surrogate mother's womb (very much like in vitro, I think?), and Rebecca raises the boy as her son (and also names him Tommy.)
The movie explores some really interesting and important themes about grief and lost love (how far would you go to "get your loved one back", even if it's just a replica), as well as prejudice (when the mothers of the second Tommy's classmates find out he is a clone, they forbid their children to talk to him.)
They don't believe he is really human, let alone that he might have a soul.
But personally, I would believe both about anyone like this I encountered.
I know it's just a movie and so the way they did things might not be completely scientifically accurate, but the social themes they were willing to explore here were quite fascinating.