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Major, non-chromosomal, birth defects and maternal physical activity: A systematic review.
MedLine Citation:
PMID:  22628185     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: We reviewed the published literature to assess the association between maternal periconceptional physical activity and the risk for major, non-chromosomal, birth defects and whether this varies by pre-pregnancy obesity. METHODS: We conducted a systematic literature search of MEDLINE, EMBASE, and CINAHL databases. Data were abstracted from all articles that met our inclusion criteria and included information on physical activity intensity (mild, moderate, and vigorous) and modality (i.e., standing, lifting, other). We assessed occupational and recreational physical activity separately. The quality of included articles was assessed using the Newcastle-Ottawa Scale. RESULTS: Of 3316 screened articles, 11 were included in this review. Of the four studies that assessed prolonged standing, two reported a positive association with risk for some birth defects; null associations were observed in the other two studies. Associations between heavy lifting or other occupational physical activity exposures and risk for birth defects were inconsistent. A protective association between leisure-time physical activity (i.e., active sports, swimming) and some birth defects (e.g., neural tube defects), was suggested by the results of two studies. Only one study reported assessment of possible effect modification by maternal body mass index (BMI). DISCUSSION: Our review suggests that there may be some associations between occupational and leisure-time physical activities and some, major non-chromosomal, birth defects, but relatively limited published research exists on these associations. Further research in this area should include differentiation of birth defects phenotypes, valid assessments of all domains of physical activity, including household and transportation activity, and account for the potential influence of pre-pregnancy BMI. Birth Defects Research (Part A), 2012. © 2012 Wiley Periodicals, Inc.
Authors:
Audrey L Flak; Ji Yun Tark; Sarah C Tinker; Adolfo Correa; Mary E Cogswell
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-25
Journal Detail:
Title:  Birth defects research. Part A, Clinical and molecular teratology     Volume:  -     ISSN:  1542-0760     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101155107     Medline TA:  Birth Defects Res A Clin Mol Teratol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Wiley Periodicals, Inc.
Affiliation:
National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia; Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee; Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia.
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