Physically she can start to become obese, especially after birth. She will also be limited in movement, which isn’t good in high school. Another major problem is financial issues, because children cost tens of thousands of dollars to raise. The child may have a bad childhood if the mother decided to keep the baby. The final major impact is that she won’t be able to get an education outside of high school for a while because she is taking care of a baby. (Of course, unless she stars in teen mom :) )