Creating a life is (normally) a perfectly voluntary action with well known consequences, and hence the people involved are morally responsible for the result. But, what are the arguments for that the act of "remaining alive" is a voluntary action (and hence something you are responsible for) or an involuntary action (you can fall back on your instincts and you will survive) and therefore not something you are responsible for?
I tend to the latter, mainly because we are "biologically programmed" to survive: heights make most people uncomfortable, breathing is handled by the autonomous nervous system, you have a lot of defence mechanisms against e.g. food poisoning (vomiting), there is a high mental threshold to commit suicide etc. Our biology is not neutral between die and survive.