The goal of the qualitative sociological study is to explore and identify the key factors and behavioral patterns that lead to adolescent pregnancy, thus helping to identify the necessary interventions to prevent them. The study was based on 5 focus groups (2 with adolescents and 3 with specialists) and 68 in-depth interviews with young girls with pregnancy experience under age of 18 years, with the male partners of the young girls, the parents of adolescents and adolescents with pregnancy experience at age under 18 years old, specialists who had experience in teenage pregnancies in the past 3 years. For the collection of data, an interview guide adapted to each category of respondents was used. Data collection took place between December 2018 and March 2019.