Does it count as a "human womb" if it was extracted from a human and kept functioning by being hooked up to a bunch of external medical machinery? Same question for an artifically-grown human womb that resides outside any human body.

extracted from a human and kept functioning by being hooked up to a bunch of external medical machinery

Only if such extraction took place before it made it into the womb. (i.e. it was an egg extracted before fertilization.)

Same question for an artifically-grown human womb that resides outside any human body.

I would count that as "not a human womb".

Is “age” here measured from fertilization or “birth”?

@derikk Fertilization

A terribly sacrilegious market. I approve.