Methods
The published results from high-quality human observational and experimental studies which analyzed the effects of supplying Multiple Micro Nutrients (MMN) on the
course of pregnancy and pregnancy outcomes were all included to this literature based analysis. Electronic search of Medline, Pub Med, Health Internetwork Access to Research
Initiative (HINARI), and Google Scholar databases up to the end of 2011 was conducted. Search was done in keywords: (“Mothers” OR “Pregnancy” OR mother* OR maternal OR pregnancy) AND (“Micronutrients” OR “multiple micronutrient*” OR multivitamin OR micronutrient*) AND (supplement*) AND (Observational OR studies OR clinical trials). A function extracting related articles as well as reference lists from research, reviews
and editorials was used during the search process. The full version of the English-language analyzed articles and abstracts of most found papers were available during the
selection process except for pubmed search.