Pregnancy is a vulnerable period when the foetus undergoes rapid development; therefore, exposure to adverse risk factors can have lifelong implications. Use of medicines during pregnancy is avoided where possible but is sometimes unavoidable. Whilst acute adverse effects following foetal exposure in utero have been assessed for several medicines, possible longer-term effects are not well understood. In particular, their effect on dental and oral outcomes is poorly understood. Using ALSPAC health data will enable us to do novel research to improve our understanding of the effects of taking medication during pregnancy on the child’s oral and dental health and development.