This chapter, providing information on contraception, presents the case of a 15-year-old woman who attended the evening emergency surgery with her mother for engaging in sexual activity with her neighbor. The chapter provides details of the patients' medical history and the key findings of clinical examination. The chapter explains how should the general practitioner (GP) manage the situation and describes the rules that govern the provision of contraception to underage women. The GP has to decide whether it is probable that she has engaged in consensual sexual activity and make a judgment about how the mother's insistence on being present at the consultation has altered her responses. Counselling about sexually transmitted infections and safer sexual practices is an integral part of consultations about contraception. Providing a safe and non-judgmental consultation for the young woman makes effective ongoing care more probable.