Introduccion: Physicological changes, sociodemographic, clinical and obstetric conditions during pregnancy lead to alterations predispose morbimortality in pregnant women. This study aims to characterize pregnant women attending antenatal care in the ESE Santiago de Tunja between January and June 2013. Materials and methods: Observational-descriptive study, in which databases were reviewed to determine the clinical characteristics and risk factors in 910 pregnant women. Results: Pregnant women aged between 13 and 46 years, 38% aged risk and 68% with another maternal history; 46% with maternal risk factor for morbidity being altered in the most common index body mass. 12.5% of total pregnant women have reported headache as the main symptom of alarm and 2.7% have showed alteration in the presentation of the fetus, and 12.5% reported headache as the main symptom of alarm. The 97% have received information about the psychoprophylactic course, guidance on food nutrition guide, and 72% received counseling on family planning before pregnancy. Conclusions: The characterization of pregnant women allowed to knowing socio-demographic, clinical and obstetric context and institutional programs towards the promotion and prevention. Maternal history and risk factors for maternal morbidity were the most frequent. Therefore, early detection and intervention is necessary.