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Obstet Gynecol Sci > Volume 55(5); 2012 > Article
Korean Journal of Obstetrics & Gynecology 2012;55(5):300-308.
DOI: https://doi.org/10.5468/KJOG.2012.55.5.300    Published online May 16, 2012.
Pregnancy prognosis according to prepregnancy body mass index and gestational weight gain in twin pregnancies.
Myung Joo Kim, Eun Duc Na, Kyoung Jin Lee, Dong Hyun Cha, Joong Sik Shin, Hwa Young Lee
1Department of Obstetrics and Gynecology, CHA Gangnam Medical Center, CHA University College of Medicine, Seoul, Korea. jlee3575@chamc.co.kr
2Department of Internal Medicine, CHA Gangnam Medical Center, CHA University College of Medicine, Seoul, Korea.
Abstract
OBJECTIVE
To analyze the pregnancy outcome and prognosis related to prepregnancy body mass index (BMI) and gestational weight gain in twin pregnancies according to the 2009 Institute of Medicine recommendation (IOM). METHODS: The study subjects were 500 twin pregnant women and their 1,000 babies delivered from January 2008 to December 2010. The women divided in 4 groups according to prepregnancy BMI; underweight (BMI<18.5 kg/m2), normal weight (18.5< or =BMI<23 kg/m2), overweight (23.0< or =BMI<25 kg/m2), and obese (BMI> or =25 kg/m2) and also categorized 3 groups according to gestational weight gain; "poor" if it was below the IOM range for the prepregnancy BMI, "normal" if it was within the range, and "excessive" if it was above the range. RESULTS: Among total 500 twin pregnant women, underweight were 76 (15.2%), normal weight 330 (66.0%), overweight 55 (11.0%) and obese 39 (7.8%); "poor" 237 (47.4%), "normal" 220 (44%) and "excessive" 43 (8.6%). The mean total weight gain during pregnancy was 16.3+/-4.9 kg and mean weight gain per week was 0.45+/-0.13 kg/wk. Gestational diabetes mellitus was significantly associated with obese women. Anemia was significantly increased in "poor" weight gain group whereas gestational hypertension, large for gestational age and neonatal Apgar score of 5 minutes under 7 were significantly increased in "excessive" weight gain group. CONCLUSION: The adverse pregnancy and neonatal prognosis were associated with abnormal prepregnancy BMI or gestational weight gain in twin pregnancies. It is important to maintain normal prepregnancy BMI and gestational weight gain through appropriate counseling and education.
Key Words: Twin pregnancy, Prepregnancy BMI, Maternal weight gain, Pregnancy outcome


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