Adolescent fertility (births to women under 20 years of age) constitutes a matter of concern for many governments, specially in regions still experiencing relatively high fertility. Early childbearing entails a much greater risk of maternal death, while the children born to young mothers tend to have higher levels of morbidity and mortality. A high dependency ratio indicates that the economically active population and the overall economy may face a greater burden in supporting the young and/or older economically dependent populations. It is also normally disaggregated into children dependency ratio and old-age dependency ratio.