Document Detail

WITHDRAWN: Periconceptional supplementation with folate and/or multivitamins for preventing neural tube defects.
MedLine Citation:
PMID:  21491380     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Neural tube defects arise during the development of the brain and spinal cord.
OBJECTIVES: The objective of this review was to assess the effects of increased consumption of folate or multivitamins on the prevalence of neural tube defects periconceptionally (that is before pregnancy and in the first two months of pregnancy).
SEARCH STRATEGY: We searched the Cochrane Pregnancy and Childbirth Group trials register. Date of last search: April 2001.
SELECTION CRITERIA: Randomised and quasi-randomised trials comparing periconceptional supplementation by multivitamins with placebo, folate with placebo, or multivitamins with folate; different dosages of multivitamins or folate; prepregnancy dietary advice and counselling in primary care settings to increase the consumption of folate-rich foods, or folate-fortified foods, with standard care; increased intensity of information provision with standard public health dissemination.
DATA COLLECTION AND ANALYSIS: Two reviewers assessed trial quality and extracted data.
MAIN RESULTS: Four trials of supplementation involving 6425 women were included. The trials all addressed the question of supplementation and they were of variable quality. Periconceptional folate supplementation reduced the incidence of neural tube defects (relative risk 0.28, 95% confidence interval 0.13 to 0.58). Folate supplementation did not significantly increase miscarriage, ectopic pregnancy or stillbirth, although there was a possible increase in multiple gestation. Multivitamins alone were not associated with prevention of neural tube defects and did not produce additional preventive effects when given with folate.One dissemination trial, a community randomised trial, was identified involving six communities, matched in pairs, and where 1206 women of child-bearing age were interviewed following the dissemination intervention. This showed that the provision of printed material increased the awareness of the folate/neural tube defects association by 4%, (odds ratio 1.37, 95% confidence interval 1.33 to 1.42).
AUTHORS' CONCLUSIONS: Periconceptional folate supplementation has a strong protective effect against neural tube defects. Information about folate should be made more widely available throughout the health and education systems. Women whose fetuses or babies have neural tube defects should be advised of the risk of recurrence in a subsequent pregnancy and offered continuing folate supplementation. The benefits and risks of fortifying basic food stuffs, such as flour, with added folate remain unresolved.
Judith Lumley; Lyndsey Watson; Max Watson; Carol Bower
Publication Detail:
Type:  Journal Article; Review     Date:  2011-04-13
Journal Detail:
Title:  The Cochrane database of systematic reviews     Volume:  -     ISSN:  1469-493X     ISO Abbreviation:  Cochrane Database Syst Rev     Publication Date:  2011  
Date Detail:
Created Date:  2011-04-14     Completed Date:  2011-04-29     Revised Date:  2013-06-28    
Medline Journal Info:
Nlm Unique ID:  100909747     Medline TA:  Cochrane Database Syst Rev     Country:  England    
Other Details:
Languages:  eng     Pagination:  CD001056     Citation Subset:  IM    
Mother and Child Health Research, La Trobe University, 324-328 Little Lonsdale Street, Melbourne, Victoria, Australia, 3000.
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MeSH Terms
Dietary Supplements*
Folic Acid*
Neural Tube Defects / prevention & control*
Preconception Care*
Pregnancy Outcome
Reg. No./Substance:
0/Vitamins; 59-30-3/Folic Acid
Update Of:
Cochrane Database Syst Rev. 2001;(3):CD001056   [PMID:  11686974 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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