In that grey area goes personal morality and belief: thus abortion should be left to the choice of the pregnant woman. Whether you or I like the decision is irrelevant.
Besides, alive is clearly not the criterion to use here. Animals and even plants are alive, yet they can for the most part be killed at will. I think 'alive and sufficiently human-like' is closer.
I can probably be considered a fanatic on this topic. In principal I have nothing against early-life infantcide either, as little babies don't seem sufficiently human-like to me.
In principle I don't have a problem with the idea of extracting a viable child late on, though it's probably not a great idea medically for mother or child at that stage.
The problem with killing anything that isn't sufficiently human-like is that the line can be too easily redrawn - which is my main problem with euthanasia as well: opens up too many practical problems in real life.
No other conditions. Maybe a 4 week waiting period to not have people killing themselves due to temporary unhappiness. Otherwise, no conditions, no age requirement, or 'sanity' requirement.
I can think of nothing more inhumane than forcing someone to live against their wishes.
In the end, Rámon Sampredo (the protagonist), who's been paralysed from the neck down for close to thirty years, commits suicide by drinking a poisonous liquid through a straw from a glass standing on a table right next to his bed. Friends of his prepared the liquid and placed the glass right next to him, but ultimately the decision to drinking the liquid is his. I'd have a hard time convicting his friends for anything, other than being good friends. "The basis of optimism is sheer terror" - Oscar Wilde
