Woman = all members of the female sex of reproductive age capable of child bearing in the context of pregnancy discussions, no need to be pedantic about the age and turn it into a girl versus woman argument, since if someone says "pregnant women", the pregnant teenage girls out there won't feel excluded and request to be addressed by "pregnant people".
Why you are so offended by the term "pregnant people" that you insist it extends to pregnant minors?
I assume you are aware that anti-gender and gender-critical people assert that "woman" means specifically "adult human female"? Where have those people said that pregnant girls are also included as women? Which law says 16 year pregnant girls and mothers are adults?
For example, Trump's Executive Order 14168 declares that women and girls refer to "adult and juvenile human females, respectively"? Following EO 14168, in the US federal bureaucracy, "pregnant woman" only refers to "pregnant adult human females". A military doctor following this EO, in the scenario you described elsewhere here, is supposed to refer to a pregnant 15 year old in ER as a pregnant girl, not a pregnant woman, even if the treatment is identical.
I don't know about you, but "pregnant people" sounds better to me than "pregnant females" as the latter seems to strip away humanity, while sounding like a bad science fiction film.
The bad faith argument is to insist that "woman" means "adult female woman" while also insisting that "pregnant woman" also somehow includes pregnant 15 year old girls.
Such a bad faith argument.