Korean J Obstet Gynecol.  2010 Aug;53(8):687-693. 10.5468/kjog.2010.53.8.687.

Pregnancy outcome according to gestational weight gain in twin pregnancies on the basis of the 2009 Institute of Medicine (IOM) recommendations

• Lee EJ
• Kim YH
• Kwon JY
• Park YW

• KMID: 2273985
• DOI: http://doi.org/10.5468/kjog.2010.53.8.687

Abstract

OBJECTIVE
The aim of this study was to investigate the effect of gestational weight gain on pregnancy outcome in twin pregnancies according to prepregnancy body mass index (BMI), on the basis of 2009 Institute of Medicine (IOM) recommendations.
METHODS
One hundred ninety-eight twin pregnancy women and their 396 neonates who delivered in Yonsei University Health System from January 1st, 2005 to April 30th, 2010. Maternal height, maternal weight in prepregnancy and gestational weight gain were retrospectively reviewed. Women were grouped into four categories of BMI: underweight (<18.5 kg/m2), normal weight (18.5~24.9 kg/m2), overweight (25~29.9 kg/m2) and obese (> or =30 kg/m2). Gestational weight gain was categorized as "Less" if it was below the IOM's recommended range for the woman's prepregnancy BMI, "Within" if it was within the range, and "More" if it was above the range.
RESULTS
Underweight with "Less" or "Within" maternal weight gain groups were associated with significantly increased odds for small for gestational age ("Less", odds ratio [OR] 6.5, confidence interval [CI] 1.75~24.14; "Within", OR 3.55, CI 1.37~9.14) and "More" weight gain with overweight or obesity groups were associated with significantly increased odds for large for gestational age (overweight, OR 6.25, CI 1.14~34.32; obesity, OR 8.33, CI 1.14~47.93). Overweight or obese women and excessive gestational weight gain were associated with significantly increased odds of pregnancy induced hypertension (overweight: OR 7.04, CI 1.04~47.78, obesity: OR 10.56, CI 1.32~84.14) and gestational diabetes mellitus (overweight: OR 13.2, CI 1.78~97.74, obesity: OR 19.8, CI 2.29~171.02).
CONCLUSION
Overweight or obese women with excessive gestational weight gain were associated with significantly increased risk of adverse pregnancy outcome in twin pregnancies. Therefore, physician should pay attention not only to prepregnancy BMI but also to maternal weight gain. A large prospective study is necessary to confirm the relationships between gestational weight gain and pregnancy outcome in twin pregnancies.

Keyword

Pregnancy outcome; Gestational weight gain; Twin pregnancies

MeSH Terms

Body Mass Index
Diabetes, Gestational
Female
Gestational Age
Humans
Hypertension, Pregnancy-Induced
Infant, Newborn
Institute of Medicine (U.S.)
Obesity
Odds Ratio
Overweight
Pregnancy
Pregnancy Outcome
Pregnancy, Twin
Retrospective Studies
Thinness
Weight Gain

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