Orbit is not infinity. What altitude would you suggest is sufficient to answer the question?
Orbit isn’t infinity, but it’s above national airspace. That precedent was set with Sputnik. It’s what allows spy satellites to fly without being shot down. It’s a pointless question. If a woman bears a child in orbit, its citizenship would be based on hers, unless it was aboard a sovereign facility of some sort (ISS wouldn’t count as US territory, due to its international nature).