pros...
the child will have to mature a lot faster and they will act as if they are grow, they will have adult tasks and jobs
cons...
they have not had time to live their life, they have to grow up fast and not get to enjoy their childhood
they have not had any real real life experience because they are still young
they don't understand what love is, they are to young to know if they are with the right one, the relationship might not work it could be more stressful than it is supposed to be