I think perhaps people confuse exactly what being pro-choice entails.
It dictates that a woman has the right to terminate a *pregnancy*, yes? To evict a foetus from her body, because it's her body and she should be able to choose what she does with it.
It does not necessarily follow that she should be allowed to choose the fate of that foetus. So... If a woman is 30 weeks pregnant, a pro-choice stance could allow her to induce labour, but not to kill the foetus or to deny it medical assistance after birth.
As for how this logic applies to the OP, a 19 week old foetus cannot live outside the womb, therefore if I'm to be pro-choice I have to respect that not all choices will sit well with me :/