Natality public-use data [Data set]. For example, adolescents who are enrolled in school and engaged in learning including participating in after-school activities, having positive attitudes toward school, and performing well educationally are less likely than are other adolescents to have a baby. Births: Final data for Source for Centers for Disease Control and Prevention. National health statistics reports: Intended and unintended births in the United States: No. The teen pregnancy rate includes pregnancies that end in a live birth, as well as those that end in abortion or miscarriage fetal loss.