Recent attention has been focused on the long-term impact of cannabis exposure, for which experimental animal studies have validated causal relationships between neurobiological and behavioral alterations during the individual's lifetime.
Links
[1] http://www.ncbi.nlm.nih.gov/pubmed/24385132
[2] http://www.rethinkpot.org/tags/study
[3] http://www.rethinkpot.org/tags/thc
[4] http://www.rethinkpot.org/tags/pregnancy
[5] http://www.rethinkpot.org/tags/consequences