The lack of periconceptional use of vitamins or supplements that contain folic acid may be associated with an excess risk for birth defects due to diabetes mellitus.
American journal of obstetrics and gynecology
Division of Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, GA, USA.
Am J Obstet Gynecol. 2012 Mar;206(3):218.e1-13
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