TY - JOUR
T1 - Prepregnancy body mass index and the length of gestation at term
AU - Stotland, Naomi E.
AU - Washington, A. Eugene
AU - Caughey, Aaron B.
N1 - Funding Information:
Supported by grant HD01262 from the National Institute of Child Health and Human Development.
PY - 2007/10
Y1 - 2007/10
N2 - Objective: The purpose of this study was to examine the relationship between prepregnancy body mass index (BMI) and length of gestation at term. Study Design: This was a retrospective study of 9336 births at the University of California, San Francisco, at ≥37 weeks' gestation. We performed univariate and multivariable analyses of the associations between prepregnancy BMI and length of gestation (≥40, ≥41, and ≥42 weeks' gestation). Results: Overweight women were more likely to deliver at ≥40, ≥41, and ≥42 weeks' gestation than were women who were underweight or normal weight. In multivariable analyses, higher prepregnancy BMI was associated with higher risk of progressing past 40 weeks. Obese women had 69% higher adjusted odds of reaching 42 weeks' gestation, compared with women of normal prepregnancy BMI (adjusted odds ratio, 1.69; 95% confidence interval, 1.23-2.31). Conclusion: Higher BMI is associated with prolonged gestation at term. Achieving optimal BMI before conception may reduce the risk of postterm pregnancy and its associated complications.
AB - Objective: The purpose of this study was to examine the relationship between prepregnancy body mass index (BMI) and length of gestation at term. Study Design: This was a retrospective study of 9336 births at the University of California, San Francisco, at ≥37 weeks' gestation. We performed univariate and multivariable analyses of the associations between prepregnancy BMI and length of gestation (≥40, ≥41, and ≥42 weeks' gestation). Results: Overweight women were more likely to deliver at ≥40, ≥41, and ≥42 weeks' gestation than were women who were underweight or normal weight. In multivariable analyses, higher prepregnancy BMI was associated with higher risk of progressing past 40 weeks. Obese women had 69% higher adjusted odds of reaching 42 weeks' gestation, compared with women of normal prepregnancy BMI (adjusted odds ratio, 1.69; 95% confidence interval, 1.23-2.31). Conclusion: Higher BMI is associated with prolonged gestation at term. Achieving optimal BMI before conception may reduce the risk of postterm pregnancy and its associated complications.
KW - obesity
KW - postterm pregnancy
KW - prepregnancy body mass index
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U2 - 10.1016/j.ajog.2007.05.048
DO - 10.1016/j.ajog.2007.05.048
M3 - Article
C2 - 17904967
AN - SCOPUS:34648840134
SN - 0002-9378
VL - 197
SP - 378.e1-378.e5
JO - American journal of obstetrics and gynecology
JF - American journal of obstetrics and gynecology
IS - 4
ER -