How would legal abortion only in the case of rape or medical neccessity work?

[OohPooPahDoo]

How would legal abortion only in the case of rape or medical neccessity work?

Particularly I am asking about the case of rape.

If a woman is raped, how would she go about getting a legal abortion in a world were abortion is legal only for rape, incest, and medical neccessity?

 

[High_Gravity]

You'd have to have proof of the rape no?