The World Health Organization estimates that about 16 million women aged 15-19 years old give birth each year, which constitutes 11% of all births worldwide (World Health Organization, 2015).Many of these pregnancies are not merely unplanned but also unwanted and major concerns arise for the well-being of teenage mothers, particularly those who are unmarried and poor. In Thailand, as the proportion of teenage mothers has increased from 12.9% (95,879) in 2003 to 16.8% (125,371) in 2013 (Department of Reproductive Health, 2013, teenage pregnancy has become a major social, policy and practice concern. The acceptance of and support for unmarried teenage mothers varies according to social and cultural contexts. Traditional Thai culture and norms regarding a woman's sexual behaviour, which include the preservation of virginity until marriage, are clearly at odds with giving birth outside marriage. However, attitudes toward sexual activity in Thailand are changing in response to the processes of modernisation and globalisation, leading to conflict between traditional and more modern values. This conflict presents a new level of complexity to the lives of unmarried teenage mothers but has yet to affect the limited welfare support that is available to them. To date, little is known about their experiences, especially those who live in poor and rural areas.This research aims to develop a better understanding of the experiences of Thai teenage mothers from these areas in order to inform the development of social policy and practice to meet their needs. The research comprised in-depth interviews with a purposive sample of 17 unmarried Thai teenage mothers from a rural area of Thailand. The sampling aimed to include what might be considered a highly vulnerable group of young women: young mothers who were aged 18 or less when their child was born, unmarried and not being supported by the father of the child.Participants were recruited from those who attended services provided by four government agencies in Buriram province, North-eastern Thailand. This province has one of the highest rates of teenage pregnancy and is one of the poorest regions in Thailand. Participants were interviewed using a semi-structured interview guide in the language and dialect of their choice. Analysis of the interview data identified common and diverse themes in their experiences and drew attention to how their experiences were shaped by their social and cultural context.In order to understand the interaction between social context and the life experiences of unmarried teenage mothers, this study is framed by the Ecological Systems Theory of Bronfenbrenner (1979).The multiple layers of the participants' environment and the interactions between them are explored ii to enhance understanding of their life experiences and to articulate the opportunities and constraints in developing policy and practice for this group.The key findings from this study illustrate the complexity of current Thai society which creates contradictions and tensions in ...