More than ten percent of the births annually in the world take place in adolescent mothers, being an alarming issue for health organizations. Objective: To identify the association between the structural and social intermediate determinants of health and pregnancy in adolescents. Material and Method: the design was quantitative, observational, analytical, of association, cross-sectional and comparative, the sample consisted of 18 adolescent pregnant women who attend the HBC of Tixtla Guerrero, 76 students from the Baltazar R. Leyva Mancilla high school, morning shift and 74 students from high school # 29 "Emiliano Zapata". For data collection, a questionnaire with closed questions of a structural type was used, in which it consists of 128 questions. Results: the average age is 17 years in the pregnant and non-pregnant population, 50.0% have a high school level of education and 33.3% have the second grade of study, in which 55.6% have stopped studying, where the 44.4% the main reason why they stopped studying was due to pregnancy, 77.8% some woman in the family had a pregnancy before the age of 17, and 77.8% did not apply having a pregnant member before the age of 17 in the family, followed by 11.1% said that the mother got pregnant, the main reason for 75.0% of their first time was because of curiosity, in which 52.9% currently have love relationships, tells us that 69.2% have a stable partner to have sex. Conclusion: The main cause of pregnancy at an early age is the lack of information from both parents, the information provided about family planning methods is considered deficient, due to poor information from health personnel.