The UK's failure to fortify flour with folic acid has caused around 2000 avoidable cases of neural tube defects since 1998, concludes research published online in the Archives of Disease in Childhood.
The UK should follow the lead of the US and 77 other countries, to curb the associated toll of fetal and infant death and disability, say the researchers.
Neural tube defects, which are birth defects of the brain, spine, or spinal cord, include spina bifida, anencephaly, and encephalocele.