While it is a choice to allow a fetus to mature,
Let's stop right there for a reality check.
That's the choice I'm talking about. It doesn't happen at a particular moment. But it's a choice made exclusively by the mother.
the maturation (a biological process) determines when the fetus is legally or socially determined to be a child. Your response ignores reality.
The biological process doesn't determine whether the human being created at conception is a child or not. "The life cycle of a Primate" is a well understood concept. That's reality. "Child" is a vague word.
Whether any particular human being has inherent worth is a very subjective determination. I tend to err on the side of "inherent worth and dignity of all human beings". Not everyone does.
Tom