Dr. Peter Fried, a psychology professor at Carleton University in Canada who has dedicated much of his career to studying the effects of prenatal marijuana exposure on infants, wrote:
Based on my 30 plus years of experience examining the newborn, infants, toddlers, children, adolescents and young adults born to women who used marihuana during pregnancy it is important to emphasize that to characterize an infant born to a woman who used marihuana during pregnancy as being ‘physically abused’ and/or ‘neglected’ is contrary to all scientific evidence (both mine and subsequent work by other researchers). The use of marijuana during pregnancy … has not been shown by any objective research to result in abuse or neglect.
Full Article:
http://rhrealitycheck.org/article/2014/05/12/marijuana-legalization-leaves-mothers-pregnant-women-behind/