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in animal studies, fetal blood and tissue THC concentrations are around 10% lower than maternal blood levels
your baby's urine THC levels will depend on how often you use, if you continue to use and if you breast feed or not.
meconium that is collected within the first 2 days of life can be used to detect maternal cannabis use from the second trimester onwards
Neonatal hair samples can also be examined for evidence of exposure during the last trimester of pregnancy, as this is when fetal hair grows.
it is unknown how long his urine will stay positive for THC. that will depend on how much you used and if you used close to delivery