Adolescent or teenage birth rate, one of indicators
of Millennium Development Goal 5, is a concern
worldwide. Its rate and trend vary across countries
depending on study design of data collection either
hospital- or population-based information, age-limited
variation for adolescent either 10-19 or 15-19 years,
study setting either developing or developed countries,
or different year of reference. Adolescent birth rate is
calculated as the number of teens giving birth per 1000
adolescent population. Teen mothers presented the
adverse pregnancy outcomes