I’ve, through the course of study in my Master of Arts program and through continuing education requirements, researched this issue at length. All the information you need to learn about the harmful effects of marijuana can be found on the internet
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And by the same token, the same internet provides access to hundreds of links that are 180 degrees opposite from your thesis.
How many of those folks who admit to marijuana usage used absolutely no other substances (other drugs, alcohol, tobacco, prescription meds)?
When faced with contradictory information, as we plainly have in the mj debate, I turn back to my own anecdotal experience, my 3 kids, and the children of those I’ve known for a long time whose parents partook (partake) of the evil weed. I see a bunch of successful college graduates, taking their place in the workforce as pretty decent citizens. Scientific? Hell no, but enough to make me concerned about personal biases appearing in the scientific literature on the topic.
DMZ, I’m scratching my head over why you would be skeptical that pot might have an effect on a child during pregnancy. Is it possible it has no effect? Certainly. But when you consider how many drugs are harmful to the fetus or are schedule C (i.e, “Elefino!”) it certainly isn’t farfetched. Heck, a lot of antibiotics are C drugs, even after decades of use.
Note that I wrote the abbove paragraph before I searched and found this:
http://www.webmd.com/baby/news/20070101/how-pot-harms-fetal-brain-development