You are a grown-up person. You are responsible for what you do. Even if you meant otherwise.
A baby is made by two persons, so, even if you call it "a mistake", he/she's your son and you're responsible for him/her.
Resuming: be cautious and you won't find yourself in an undesirable situation. You can't bring this world a child and forget about your responsability of taking care of him.
