A teenager is a person who age ranges between thirteen and nineteen. They are termed to as teenagers because their age numbers usually ends in "teen". Teenagers go through a lot of physical and mental changes during these times. People in this age are considered minors. Girls usually reach full physical development by age of 15–17 while boys usually complete puberty between ages of 16–18. Teen age is the age when one must take good care of their health with healthy nutritious substitutes. This age is when the youngsters are very reluctant and can easy fall prey to bad deeds. Teenagers these are face varied health problems due to their innocence and less detailed information on one's own life. Teenage pregnancy is one of major disastrous activities that prevailing in every society of the world possible.