DH and I got married when I was 18 and he was 19. And no we were not pregnant. We just felt that it was the right time for us. We have had our fair share of the ups and downs but we are doing better than ever. Our 13 year wedding anniversary is this Monday 1-7-13!
I was 19 & he was 20. We didn't have our first baby until 7 years later. We'd been together 3 years (& lived together 1.5 years) before we tied the knot. We got married because we were crazy about each other. We still are. Been married 13 years. I think the success or demise of such a thing really depends on the couple & the circumstances. It's all relative.
Dh proposed when he was 16, he wanted to get married when he turned 18 (I would have already been 18 by then). But we decided to wait, we got married at 21 amd didn't have dd until 5 years later. If we had gotten married at 18, I'm pretty sure we'd still be married but things would have been harder. Because I waited to get married, my parents covered almost all of my bachelor's degree so I got out with almost no student loans.
I settled down at 16 and got pregnant at 19...I'm undecided on my relationship now. I personally regret getting w him so young. Make sure your ready for a long term commitment. I'm not married, just living together.