Long story short, I'm writing a plot device to be used for a story later. But I've got a dilemma in my story.

If a society can create perfect synthetic women, what unique value does an organic woman have outside of child birth/Ova production?

I'm trying to keep this as believable and logical as possible. In all of my explanations within the story is sensible and doesn't involve "well...just because okay!" or "space magic" as a reasoning for anything. But I keep coming back to this question. I'm really trying to prevent the women of my story from essentially becoming body farms but when faced with the consequences of such a system it always devolves into that.