Inadequate gestational weight gain and adverse pregnancy outcomes among normal weight women in China.
OBJECTIVE
The objective of the paper is to find the association between inadequate gestational weight gain and pregnancy outcomes in normal weight women in China.


METHODS
A retrospective study was conducted among 13,776 normal weight pregnant women who received antenatal care and delivered singleton infants at the participating hospital during August, 2009 to July, 2013. Adverse pregnancy outcomes like low birth weight (LBW), preterm birth, birth asphyxia, neonatal intensive care unit (NICU) admission and length of hospital stay were compared and analyzed between two groups with inadequate and adequate gestational weight gain.


RESULTS
According to the IOM recommendations, inadequate gestational weight gain was found to be 14.7% in this study. Women with inadequate gestational weight gain (GWG) were found to be at a higher risk for LBW (aOR = 2.13, 95% CI: 1.75, 2.86) and preterm birth (aOR = 1.44, 95% CI: 1.21, 1.67) than those in the adequate gestational weight gain group, after adjusting for monthly family income, maternal education, occupation, and whether they received any advice regarding benefits of gestational weight gain and residential area. However, inadequate GWG was not associated with longer hospital stay (aOR = 1.13, 95% CI: 0.91-1.43) in adjusted model. In addition, the rate of birth asphyxia and NICU admission were similar in both groups (P > 0.05).


CONCLUSIONS
Normal weight pregnant women with GWG below the recommended AIOM 2009 guidelines were found to be at an increased risk of low birth weight and preterm birth.
Neonatal Therapeutic Office, Department of Obstetrics and Gynecology, Beijing Jishuitan Hospital Beijing 100035, China.
Tingyuan
T
Wen
Clinical Statistics and Epidemiology Research Office, Traumatology and Orthopaedics Research Institute of Beijing & Beijing Jishuitan Hospital Beijing 100035, China.
Yanwei
Y
Lv
Gestational weight gain; low birth weight; pregnancy outcomes; preterm birth