Pregnancy: Cannabis

The Mothers and Babies: Reducing Risk through Audits and Confidential Enquiries across the UK (MBRRACE-UK) programme is responsible for reviewing stillbirths and neonatal deaths across the United Kingdom to identify causes, improve clinical care, and reduce future preventable deaths. Analysis of MBRRACE-UK data found that between 2014 and 2024, there were 17 neonatal deaths attributed to accidental suffocation, with only one case explicitly linked to cannabis use. There was also one neonatal sudden infant death syndrome case involving maternal cannabis and alcohol history, and one neonatal death where maternal cannabis use was a secondary contributor. There were thus a total of three neonatal deaths linked to cannabis use between 2014 and 2024.

The National Child Mortality Database (NCMD) collects and analyses data on the deaths of all children under 18 years of age. The latest data published by the NCMD highlighted that of the deaths reviewed by Child Death Overview Panels between April 2024 and March 2025, substance misuse during pregnancy was identified as a contributing factor in 62 out of 4,035 infant deaths where data was available. The NCMD thematic report on Deaths of children and young people due to traumatic incidents also highlighted that between 1 April 2019 and March 2022, there were 42 deaths as a result of accidental strangulation or suffocation. 13, or 31%, children were aged under one years old, 17, or 40%, were aged one to four years old, and 12, or 29%, were aged five to 17 years old. In total, 18 children died where entrapment or overlay was found to be a significant contributing factor, but the analysis did not look at whether or not there was substance misuse by the parents.