One in 50 pregnant women use cannabis in places where the drug is legal, a major study suggests — despite the major health risks it poses to babies.
Researchers in Canada, where marijuana can be used recreationally, surveyed 1.2million mothers-to-be over six years.
Twenty-thousand admitted to using the drug while carrying their child, which is likely to be an underestimate because some women may not have told the truth.
Analysis of their medical records showed that cannabis use was linked to…
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