The context is everything…
when referring to a clearly adult woman as a girl, we (or they) are emphasising the lack of socially normal adult behaviours or expectations they’re demonstrating. Or expecting/wanting to demonstrate. In other words shaking off adult responsibilities. Of course women refer to their mates as “ girlfriends”, the girls etc- we’d all like a great time with each other letting our hair down.
but that’s a great deal different when someone refers to us a girl in settings when we need to be an adult or be recognised as an adult. With adult autonomy. Most women would object to their boss always referring to them as a girl in front of other staff…it’s patronising and devalues their work. Or if a police officer, a medic etc. or a complete random stranger referred to them as a girl, particularly if a man.
how often do men refer to adult men as “ boys” like that? Some men might say a “ boys night out” with their mates, but no boss is going to say to a group of men “come on boys…” it is entirely deliberate that in countries with a racial segregated history, whites often referred to black men as “ boys”. God forbid some still do. It is entirely deliberately disempowering and controlling. Women are just raised to be nice to put up with girl shit a lot longer, from people who want to control them.
But in same reverse way predatory men refer to girls as women to justify their dodgy behaviour. It is firmly implying that girls have adult responsibilities and expectations to be able to consent knowingly, that they should have wisdom beyond their years, and they are responsible for what happened to them. The language is entirely victim blaming.
the term women in this legal and moral context regarding sexual activity should always follow the law. In uk that is 16 at minimum. Even if a 14 year old was pregnant strictly she is still a Child legally and therefore term girl is correct. Maybe midwives etc might refer to her as pregnant women out of respect for her level of responsisiblty she now has, and autonomy because her anatomy is clearly that of a fertile female adult. But she is still a child legally.