Teenager pregnancy had become such a major problem in today’s society. As we can see that pregnancy among school and university students in Thailand can cause many serious problems due to their role and responsibilities of both parties. Most young couples and teenagers who are pregnant premature will lost opportunities in life because they have lack of education in health. Thus, there are many ways to prevent teenager from becoming pregnant which are; good guidance from parent, know your children’s friend, know what your children do in their routine.