Teenage pregnancy is a high-risk public health problem associated with maternal and fetal adverse outcomes. An effective preventive strategy should be developed as youth development programs that must include balanced sex education, confidential and low cost access to contraceptives, easy access to health clinics and support of families and healthcare professionals. The study was the comparative assessment of the two groups of pregnant mothers, teenagers and adult pregnant women. A cohort study with retrospective descriptive and follow-up prospective was designed to explore the demographic, social, sexual, psychological behaviors and associated medical risks in comparison.