The British Medical Association (BMA) has told people to stop calling pregnant people expectant mothers because it could offend transgender people. Instead, call those females “pregnant people.” From The Telegraph:
On pregnancy and maternity, it says: “Gender inequality is reflected in traditional ideas about the roles of women and men. Though they have shifted over time, the assumptions and stereotypes that underpin those ideas are often deeply-rooted.”
It adds: “A large majority of people that have been pregnant or have given birth identify as women. We can include intersex men and transmen who may get pregnant by saying ‘pregnant people’ instead of ‘expectant mothers’.”