I would have to agree with nadza. It is instilled in a woman biologically -- we just want to have babies. Have you ever noticed even in daycare three year old girls playing with dolls being mummy, feeding them, putting them to sleep? I'm not saying all girls are like that, I for one climbed trees and fell into ditches when I was growing up instead, but that's the norm.
I always wanted a baby, even before I had my rags (sorry for the bluntness) or had sex, although I did think of it in terms of the future. But I can understand why other people want to have babies at a younger age -- I always wanted my first at 20, but I ended up being pregnant at 16. And you know, I felt ready. I still don't feel too young, and I'm 19. I woulnd't call us premature. Premature means not mature enough -- and premature girls can't get pregnant because they are physically not mature enough. When one is emotionally mature enough I don't think you could cut off somebody at 16 and say -- you're not emotionally mature. Everybody's different. I felt mature enough.
And I don't believe that you can't raise children well when you're young. Everyone in my family other than my mother had their first just after hitting 20 -- I know, it's a bit older than the teens, but that's just how it was. Some people feel ready, other's don't.
Especially in Western culture (I'm not meaning to offend anyone but it's true) 'raising' a child properly usually means giving them the two-storey house and a lot of other material things. Geez, if my ancestors could even dream of that, living in communal flats with other families! I really can't agree with kaileyamanda that young girls aren't ready. I was, even if it wasn't planned. I find it hard to understand how women at 14 can be ready -- because I was a virgin then and just couldn't imagine it, and I find it hard to understand why people who are 30 don't feel ready either sometimes. But just because I don't fully understand their point of view, doesn't mean that it's not legitimate.