Document Detail

Risk factors for term small for gestational age infants in women with low prepregnancy body mass index.
MedLine Citation:
PMID:  20598029     Owner:  NLM     Status:  MEDLINE    
AIM: The purpose of our study was to investigate the association between low maternal prepregnancy body mass index (BMI) less than 18.5 kg/m(2) and the incidence of small for gestational age (SGA) infants.
MATERIAL & METHODS: This was a cross-sectional study. The women with BMI of less than 25.0 kg/m(2) who gave birth to single term infants (37-42 weeks) at clinics and hospitals in the Tokyo metropolitan area between 2003 and 2004 were analyzed for risk factors for SGA.
RESULTS: Five hundred and seventy-two women were underweight (BMI < 18.5 kg/m(2)) and 2708 (75.1%) were normal (18.5 <or= BMI < 25.0 kg/m(2)). Birthweight, analyzed by multiple regression analysis, was highly related (P < 0.05) to gestational age, maternal age, parity, prepregnancy BMI, maternal weight gain and maternal smoking status. Women with a less than 9 kg weight during pregnancy were 1.8 times (confidence interval [CI], 1.6-2.2) more likely to give birth to an SGA infant compared with women who gained 9-12 kg. Maternal smoking more than 10 cigarettes per day was associated with an increased risk of having an SGA infant (odds ratio [OR], 2.5; CI, 1.8-3.5). Women with prepregnancy BMI less than 21.0 kg/m(2) were associated with an increased risk of having an SGA infant (OR, 1.6; CI, 1.3-2.2 for BMI < 18.5 kg/m(2), and OR, 1.4; CI, 1.2-1.7 for 18.5 <or= BMI <or= 21.0 kg/m(2)).
CONCLUSION: We conclude that the detrimental effect of low prepregnancy BMI in Japanese women on birthweight and incidence of SGA infants. Our findings suggest that appropriate maternal BMI at conception followed by adequate weight gain during pregnancy may have a substantial influence on reducing the SGA infants and increasing the birthweight.
Hiroko Watanabe; Kazuko Inoue; Masako Doi; Momoyo Matsumoto; Kayoko Ogasawara; Hideoki Fukuoka; Yasushi Nagai
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of obstetrics and gynaecology research     Volume:  36     ISSN:  1447-0756     ISO Abbreviation:  J. Obstet. Gynaecol. Res.     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-07-05     Completed Date:  2010-10-08     Revised Date:  2012-01-19    
Medline Journal Info:
Nlm Unique ID:  9612761     Medline TA:  J Obstet Gynaecol Res     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  506-12     Citation Subset:  IM    
Clinical Nursing, Maternity Nursing and Midwifery, Shiga University of Medical Science, Otsu, Shiga, Japan.
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MeSH Terms
Analysis of Variance
Birth Weight*
Body Mass Index*
Infant, Newborn
Infant, Small for Gestational Age
Odds Ratio
Risk Factors
Smoking / adverse effects*
Thinness / complications*

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

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