Does prenatal exposure to cannabis cause cognitive impairment?

Does prenatal exposure to cannabis cause cognitive impairment?

Researchers from Columbia University have just confirmed what many people already knew – that public policy regarding cannabis tends to be based on scientific findings that are murky at best and non-existent at worse. In a new study, the team probed the widely – accepted idea that cannabis use during pregnancy hinders infants’ cognitive development, and found that there has never been any real evidence to support this.  It’s worth noting that this doesn’t mean that smoking weed while pregnant is definitely safe, but rather that there is no categorical proof that prenatal exposure to cannabis causes mental impairment. This is pretty significant when you consider that some 1,600 studies on the impact of marijuana on fetal cognition have been conducted over the past three decades.   With that in mind – and at a time when dispensaries are increasingly offering cannabis products as treatments for morning sickness – the tendency of policymakers to cling to such unproven notions about the risks and benefits of these medications is only creating unnecessary confusion and suffering. So the question is, how has this erroneous idea been allowed to persist for so long?  In an attempt to solve this conundrum, the authors reviewed every study that has ever looked into the impact of prenatal cannabis exposure on cognition later in life. Before starting, they discarded all studies involving rats, and were left with a stack of research papers that described actual people who had been exposed to cannabis while in the womb.  The combined literature contained only three instances in which the cognitive test results of these people fell below the normal range, out of a total of 1,004 comparisons. In…

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Source : seedman
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