[oldkinglog]

In the UK, the Equality Act (2010) protects: age, disability, gender reassignment, marriage or civil partnership (in employment only), pregnancy and maternity, race, religion or belief, sex, sexual orientation.

Pregnancy, maternity, marriage, civil partnerships and gender re-assignment are usually chosen by individuals, not forced upon them.

[Scarblac]

Disagree on gender re-assignment, people don't choose to have gender dysphoria just like they don't choose sexual orientation.

[oldkinglog]

I didn't mean to imply that people choose to have gender dysphoria, sorry if it came off that way.

[usr1106]

Pregnancy and maternity are desired by the society as a whole. So they might receive some positive discrimination.

(Stress on might and some, probably still not enough in may rich countries to stop native population from shrinking.)