Associations of the pre-pregnancy body mass index and gestational weight gain with pregnancy outcomes in Taiwanese women

I-Hsien Tsai, Chih-Ping Chen, Fang-Ju Sun, Chia-Hsun Wu, Sung-Ling Yeh
Asia Pacific Journal of Clinical Nutrition 2012, 21 (1): 82-7

BACKGROUND: Pre-pregnancy weight and gestational weight gain (GWG) are important factors in both maternal and infant outcomes. Little information is available in relation to different levels of pre-pregnancy body mass index (BMI) and body weight gain on obstetric outcomes in Taiwan. This study investigated the associations between pregnancy complications with pre-pregnant BMI and GWG, in Taiwanese women.

METHODS: Data were extracted from a delivery room information bank on all women delivering singleton babies in a medical center. Eight hundred and sixty pregnant women were included. The collected variables included basic information, GWG, and pregnancy and neonatal outcomes. Pregnant women were categorized according to their pre-pregnant BMI and GWG to evaluate the impacts of pre-pregnant BMI and maternal weight gain on the risk of pregnancy complications. Univariate and multivariable logistic regression analyses were performed, and odds ratios were calculated.

RESULTS: Pre-pregnancy BMI>=24 kg/m2 increased the risks of gestational diabetes mellitus, preeclampsia, and preterm labor. Preeclampsia and Cesarean delivery were positively associated with high weight gains (>18 kg), whereas a low birth weight and preterm labor were strongly associated with low weight gains (<10 kg). A higher birth weight was found with a GWG of >14 kg in women who were underweight and normal weight before pregnancy.

CONCLUSION: An appropriate maternal BMI (18.5-24 kg/m2) at conception followed by a suitable gestational weight gain (10-14 kg) has substantial impact on the overall health of pregnant women and would lead to better obstetric management for Taiwanese women.

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