Pro-choice and pro-life are terms of self-identification used by the two sides of the abortion debate: those who support access to abortion, and those who seek to restrict it, respectively. They are generally considered loaded language, since they frame the corresponding position in terms of inherently positive qualities (and thus position their opponents as "anti-choice" or "anti-life"). For this reason, more neutral or descriptive alternatives are sometimes preferred, for example by describing groups or individuals as supporters or opponents of abortion or abortion rights.
The term pro-life began to be used by opponents of legal abortion around the early 1970s, born from the related term "right to life". The term pro-choice (or "right to choose") was coined in response by abortion rights advocates shortly after.