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Carcinogens and toxins can remain for around 3 years. THC will leave the brain, given the dose you took, in about 1 hour and finish circulating through the foetus's body in about 2 hours. Don't worry about this dose- it will have no noticeable adverse effect if you do it once. BUT- if you take it regularly (more than 1 hit a week), the THC you breath in will almost certainly cause unusual brain development in your baby. This may mean personality disorders, stunted growth or learning difficulties. The best thing to do when you're pregnant is to stay off it all- cannabis, tobacco and alcohol. Scientists seem to discover a link between these things and birth defects so regularly it just isn't worth the risk.

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16y ago

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