Use marijuana while pregnant, and your child is more likely to suffer sleep problems as much as a decade later, according to a new University of Colorado Boulder study of nearly 12,000 youth.

Published in Sleep Health: The Journal of The National Sleep Foundation, the paper is the latest to link prenatal cannabis use to developmental problems in children and the first to suggest it may impact sleep cycles long-term.

It comes at a time when – while the number of pregnant women drinking alcohol and smoking cigarettes has declined in the United States – It has risen to 7% of all pregnant women as legalization spreads and more dispensaries recommend it for morning sickness.



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