In my post about abortion I used mostly pathos, the appeal to emotions. I used this because it is an emotional topic, many emotions are attached to death of any kind and abortion is heightened because it is viewed as the death of a child by many. By asking the reader to consider if it were one of their own loved ones in the situation it allows them to imagine abortion as a subject closer to home instead of something that could only happen to other people and "could never happen to me". This puts the reader in a position that will most likely make them uncomfortable, hence the title, and make them think what would they do if they were really in that situation. Getting the reader to say "well I would understand if my daughter had an abortion if such and such happened" or "I would have an abortion in thing certain circumstance" goes a long way to get them to the point to question if they should truly be limiting a stranger's ability to make that choice.
I also used a bit of logos, the logical appeal. By using long toward the end and asking the reader why certain types of abortion are okay and what the difference between limiting a woman's choice to certain situations and giving her a choice in general (with a time limitation of course, we are not seeking to kill 8 month old fetuses). This makes the reader question their own logic.
Getting the reader to question their own opinions is the first step to getting them to change their opinions on a subject.