I know 2 students in my year at my school had children at 14. Their lives have worked out the polar opposite of each other.
They were both very silly and immature at 14 and spent half their time trying to date older boys and not bothering with lessons half the time. Unfortunately for them they didn't have particularly supportive families and the school felt they were a bad example to other students (early 1980's) so refused them back into school once they couldn't cover their bumps with the standard uniform.
1 girl came back to school after having her baby and sat her CSEs but failed most. She got the odd low skilled job and eventually gave up working and ended up living with several different partners over the years and I occasionally hear about her on facebook where she doesn't appear to have had much luck in life and lives hand to mouth and in receipt of benefits.
The other girl got really cross with the situation she got in to. She moved out of home because her parents were unsupportive and went to foster parents to support her and her baby. She did her CSEs and A Levels then went to University. Shes a senior nurse now married to a Doctor. She has a great life that she fought for. It took getting pregnant to show her what she really wanted in her life. She is happy to talk about how she turned her life around to try and help prevent others going through the same thing she did.
I have sympathy for girl 1, she really needed a lot of support that just wasn't given to her.
Girl 2 I'm really proud of what she has done with her life against all odds. She could easily have ended up just like girl 1.
When I first heard (aged 13/14) they were pregnant I was shocked and horrified. I was the same age as them and couldn't understand why on earth they would want to chase boys, have sex or get pregnant and keep it. I genuinely felt their lives had been totally ruined and that they must be stupid/insane to put themselves in that situation.
Its only years later I can look at their situation more objectively and see how many things in their lives lead them down that path.