BBC News bias towards pro-abortion campaigners

In Abortion battle lines drawn in Mississippi, BBC News captions a photograph of anti-abortion protests as follows.

Pro-choice and anti-abortion campaigners at a demonstration in South Dakota where most abortions have been banned

The BBC refers to pro-abortion activists as they refer to themselves, that is, “pro-choice”, a loaded term implying the negative opposite “anti-choice” — sounds repressive, doesn’t it? If it refers to pro-abortion campaigners as “pro-choice”, why does it not refer to anti-abortion activists as “pro-life”, as they call themselves?