Reza Omani-Samani1, Mahdi Sepidarkish1, Saeid Safiri2, Arezoo Esmailzadeh3, Samira Vesali1, Farahnaz Farzaneh4, Amir Almasi-Hashiani1. 1. 1Department of Epidemiology and Reproductive Health, Reproductive Epidemiology Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Royan Institute, Bani Hashem Place, Hafez St., P.O. Box: 16635148, Tehran, Iran. 2. 2Managerial Epidemiology Research Center, Department of Public Health, School of Nursing and Midwifery, Maragheh University of Medical Sciences, Maragheh, Iran. 3. 3Department of Obstetrics and Gynecology, Zahedan University of Medical Sciences, Zahedan, Iran. 4. 4Infertility Fellowship, Department of Obstetrics and Gynecology, Infectious Disease and Tropical Medicine Research Center, Zahedan University of Medical Sciences, Zahedan, Iran.
Abstract
BACKGROUND: Gestational weight gain (GWG) proportional to body mass index before pregnancy is one of the factors on maternal and neonatal outcomes. The aim of the current study was to assess association between GWG, and cesarean section, birth weight and gestational age at birth in women with normal BMI prior to pregnancy. METHODS: This was a cross-sectional study carried out in 103 hospitals in Tehran, the capital of Iran, from July 6 to 21, 2015. The data were extracted by 103 trained midwives. Finally, 2394 pregnant women with normal BMI before pregnancy and singleton birth were examined. GWG was categorized based on Institute of Medicine (IOM) recommendations. RESULTS: Prevalence of low birth weight (LBW) was 5.41% and prevalence of macrosomia was 2.18%. The prevalence of LBW in women with GWG less than the weight gain recommended by IOM was 2.13 times [95% confidence interval (CI) 1.13-4.02, P = 0.019] more than in women with GWG equal to the weight gain recommended by IOM. There was no statistically significant difference in the prevalence of LBW between women with GWG more than recommended weight gain by IOM and women with GWG equal to the weight gain recommended by IOM (OR = 1.21, 95% CI 0.61-2.38, P = 0.580). CONCLUSION: After controlling for confounding variables, the prevalence of cesarean section and preterm birth had no significant difference at various levels of GWG. Accordingly, the prevalence of LBW among women with GWG less than the recommended weight gain by IOM was significantly 2.13 more than that among women with GWG equal to the recommended weight gain by IOM.
BACKGROUND: Gestational weight gain (GWG) proportional to body mass index before pregnancy is one of the factors on maternal and neonatal outcomes. The aim of the current study was to assess association between GWG, and cesarean section, birth weight and gestational age at birth in women with normal BMI prior to pregnancy. METHODS: This was a cross-sectional study carried out in 103 hospitals in Tehran, the capital of Iran, from July 6 to 21, 2015. The data were extracted by 103 trained midwives. Finally, 2394 pregnant women with normal BMI before pregnancy and singleton birth were examined. GWG was categorized based on Institute of Medicine (IOM) recommendations. RESULTS: Prevalence of low birth weight (LBW) was 5.41% and prevalence of macrosomia was 2.18%. The prevalence of LBW in women with GWG less than the weight gain recommended by IOM was 2.13 times [95% confidence interval (CI) 1.13-4.02, P = 0.019] more than in women with GWG equal to the weight gain recommended by IOM. There was no statistically significant difference in the prevalence of LBW between women with GWG more than recommended weight gain by IOM and women with GWG equal to the weight gain recommended by IOM (OR = 1.21, 95% CI 0.61-2.38, P = 0.580). CONCLUSION: After controlling for confounding variables, the prevalence of cesarean section and preterm birth had no significant difference at various levels of GWG. Accordingly, the prevalence of LBW among women with GWG less than the recommended weight gain by IOM was significantly 2.13 more than that among women with GWG equal to the recommended weight gain by IOM.
Authors: Sarah D McDonald; Zhen Han; Sohail Mulla; Olha Lutsiv; Tiffany Lee; Joseph Beyene; Prakesh Shah; Arne Ohlsson; Vibhuti Shah; Kellie E Murphy; Sarah D McDonald; Eileen Hutton; Christine Newburn-Cook; Corine Frick; Fran Scott; Victoria Allen; Joseph Beyene; John D Cameron Journal: J Obstet Gynaecol Can Date: 2011-12
Authors: Luz Gibbons; José M Belizan; Jeremy A Lauer; Ana P Betran; Mario Merialdi; Fernando Althabe Journal: Am J Obstet Gynecol Date: 2012-03-01 Impact factor: 8.661
Authors: Abdullah A Mamun; Mansey Kinarivala; Michael J O'Callaghan; Gail M Williams; Jake M Najman; Leonie K Callaway Journal: Am J Clin Nutr Date: 2010-03-17 Impact factor: 7.045
Authors: Nan Li; Enqing Liu; Jia Guo; Lei Pan; Baojuan Li; Ping Wang; Jin Liu; Yue Wang; Gongshu Liu; Andrea A Baccarelli; Lifang Hou; Gang Hu Journal: PLoS One Date: 2013-12-20 Impact factor: 3.240