Problem: Adolescent pregnancy is one of the main problems of public health concerning the health of Brazilian teenagers, being the pregnancy on this population often unplanned and sometimes unwanted by the young girl, her partner and/or family. Objective: Observe the rate and risk factors for unwanted and unplanned pregnancy amongst teenagers. Method: Hereby we present a descriptive study, transversal with quantitative approach that took place at one Maternity-School of Fortaleza with 200 puerperal teenagers that were at the hospital for the end of their pregnancy between March and July of 2009. Results: We've noticed that 67,5% of pregnancies wasn't planned, however, wanted by most of them. Greater planning occurred between teens aged more than 15 years, dun, married, with incomplete basic education and winnings of less than a minimum wage. As for the desire of the gestation, we've noticed the same higher rate between those older than 15, dun, married differing only that these had basic education and winnings of more than 3 minimum wages. The variable that has presented most statistic relevance was the marital status regarding planning and desire to start pregnancy. Conclusion: The need of effective public policies for teenagers became evident, mainly on the access to quality family planning at the healthcare units.