This factsheet has been written for members of the public by the UK Teratology Information Service (UKTIS). UKTIS is a not-for-profit organisation funded by Public Health England on behalf of UK Health Departments. UKTIS has been providing scientific information to health care providers since 1983 on the effects that medicines, recreational drugs and chemicals may have on the developing baby during pregnancy.

LSD use in pregnancy is not advised. When a pregnant woman uses LSD it enters her bloodstream and crosses the placenta to the baby. There is very little high quality scientific information on the effects that LSD use in pregnancy might have on a developing baby’s health or brain. The little information that is available suggests that LSD use may be harmful to a pregnancy.