Here are links to some studies I have found: https://www.ncbi.nlm.nih.gov/pubmed/24330413   Herbal medicine use in pregnancy: results of a multinational study. https://www.ncbi.nlm.nih.gov/pubmed/23843424  In vitro inhibition of human CYP1A2, CYP2D6, and CYP3A4 by six herbs commonly used in pregnancy. http://www.pregnancy.com.au/resources/topics-of-interest/pregnancy/raspberry-leaf.shtml Raspberry Leaf info from Australia http://www.uofmhealth.org/health-library/hn-2154002   University of Michigan Health System This on is worth exploring:   http://www.herbcyclopedia.com/item/raspberry-leaf-tea-2 http://www.webmd.com/vitamins-supplements/ingredientmono-309-red%20raspberry.aspx?activeingredientid=309&activeingredientname=red%20raspberry  

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