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.
2012-03-02

Eng.
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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