Getting a marriage certificate for college students has no effect on graduate school and doctoral studies. According to national laws, as long as you reach marriageable age, you can get married when you go to college. You can naturally move out if you get a permit, as long as you apply to the college. If you want contraception, boys can bring condoms and girls can take birth control pills. But taking medicine for a long time has an impact on girls' health, so boys had better wear condoms.