Umbilical cord
Yeah, I know, I've studied neuroscience in college.
Not exactly. Kids that old still know exactly what they're doing. Heck, they have to learn to walk, talk, and interact with others somehow. Just because you don't remember things from when you were that old doesn't mean they didn't happen. Since you're so young, your not held in high responsibility for them, but what you did still happened. Here's an example... when I've babysat my buddy Peter (from the time he was born until he and his parents moved when he was 4), he would knock over his brother's tower of blocks, laugh about it, and do it again when the tower was rebuilt. Point of the story: he knew what he was doing.
No, just read what I already wrote. Let's put it this way...
I BELIEVE that the fetus is the preliminary basis of a life. Beginning of a new life comes when the developed fetus (as a baby) is detached from it's mother physically and is an independant being. Like how a branch is not a tree unless is rooted and grows on its own, the baby must root (ie, become detached from it's mother) and grow (ie, grow up) on it's own.
H-D