Reproductive health education is crucial to ensure young people understand their reproductive system and can make informed decisions about their sexual lives and fertility, including whether they want to have children or not. This study involved an investigation of the intended UK school curricula for 14-18 year-olds as they relate to reproductive health. Analysis revealed substantial differences. Most, but not all, specifications include sexually transmitted infections, hormonal aspects of reproduction, contraception, the menstrual cycle and assisted reproductive technology (ART). Important topics, such as endometriosis, fertility, preconception health, pregnancy, miscarriage, menopause and infertility (except in the context of ART) are missing from examination specifications and/or the RSE/RSHP curricula. We conclude that many young people in the UK are at risk of leaving school with inadequate understanding of concepts that have important implications for their reproductive health. There are differences between nations, with Scotland having the most comprehensive coverage of topics in its curriculum. High-quality reproductive health education should be an entitlement for all young people. It should give young people accurate and up-to-date information and enable them to discuss issues and develop their own thinking. Ideally, sex and reproductive health education would be taught comprehensively across the RSE/RSHP and science curricula.