There is a need to understand teenagers’ views towards having children to better tailor sexuality and reproductive health education. We conducted a survey of parenthood intentions for 16–18-year-old students. The survey was anonymous, contained open-ended and multiple-choice questions and was live from 10 May 2021 to 18 July 2022. The sample size was n = 931. Quantitative data were analysed descriptively and using chi-squared tests; qualitative data were analysed thematically. The majority of students (64%) indicated they wanted to have children in the future, with 49% desiring to have two children. Students who opted against having children cited the turbulent state of the world, concerns about parenthood, and, for many females, negative associations to pregnancy and childbirth. Many students felt concern about the possibility of having children in the future (45%), expressing concerns about their ability to have healthy children and worries about the lives their children might lead. Six themes were identified in their responses to the question ‘What are your concerns about the possibility of having children in the future?’: Fears; Self-doubt; Health and wellbeing; Big investment; Hinderance to personal aspirations; and Non-inclusive LGBTQ+ education. We conclude by making recommendations as to how school reproductive health and sex education might be improved.