Science and medicine deals in absolute details, not in blankets covering everyone. When a doctor needs to treat you, they need to know your sex, weight and age, since the dose or treatment is highly specific on those variables, there's no such thing as an inclusive thing to cover everyone the same. Inclusivity here would get you killed.

> It harms no-one to say “pregnant people”

It also helps no-one now, and it also harmed no-one in the past to say "pregnant women", since no-one other than women can get pregnant. So why did it have to be changed other than for virtue signaling?