In the majority (please note that "majority" DOES NOT MEAN ALL) of cases, teen pregnancy has a devastating effect on the individual, the individual's family, and the community.

The community is burdened with helping support the teen and the teen's child because in most cases the teen's family either doesn't want to or just cannot afford to financially support them. No teen (under eighteen) can finish school, work full time, and care for a newborn all at the same time. This is why 80% of teen parents use welfare a some point. With no education, a minimum wage job is the best most teens can get.

The teen's family is negatively impacted in many cases because they are directly responsible for the teen parent, because she is still a minor. This means that they now have an additional child to care for, financially, emotionally, and physically, even though they did not want another child. If they did, they would have had another baby themselves.

The teen in most cases is negatively effected in many more ways than could fit into this post. Most of them are doomed to live in poverty. Most of them never go to college or get a career that they can enjoy. They all miss out on the rest of their teen years and experiences, just based on the fact that they have parental responsibilities that that peers do not.