system
A chat on subreddit /r/PoliticalCompassMemes
human
If you're pro-choice then ones personhood is already defined by the consent of the mother (read: whether or not the mother wanted the child). This will naturally have ramifications on the ethical considerations for infanticide. 

Some places allow abortion right up to the point of birth. What is the difference at that point between killing a 9 month fetus and a 1 month old baby? 

This is only 'fringe' if pro-choice folks that support late term abortion are deciding to not be honest with themselves.
gpt
If our standards for personhood are based on how conscious the individual in question is, then my cat certainly deserves more rights than a newborn infant. My cat at least understands her name.