The optimal range of gestational weight gain for singleton term nulliparous pregnancies in north region of China
Objective:To approach the optimal range of gestational weight gain for singloten term nulliparous pregnancies in north region of china.Methods:The information of 5 072 singleton nulliparous pregnancies delivered in Shenyang region were collected.The information contained pre-pregnancy,pregnancy and postpartum conditions of each woman.The 5 072 women were divided into three categories according to Chinese classification of body mass index(BMI):pre-pregnancy underweight(18.5 kg/m2),normal weight(18.5～24 kg/m2),overweight and obesity(≥24 kg/m2).The relationship between gestational weight gain and adverse pregnancy outcome and recommending optimal range for gestational weight gain were analyzed.Results:The rate of pre-pregnancy underweight,normal weight,overweight and obesity was 16.8 %,66.8% and 16.4%,respectively.The ranges of gestational weight gain which caused the lowest mobility of adverse pregnancy outcome were 12～18 kg,10.0～16.0 kg and 8.0～14.0 kg(P0.05),respectively.The recommending optimal ranges of gestational weight gain were 12～18 kg,10.0～16.0 kg and 8.0～14.0 kg respectively.Conclusion:The average gestational weight gain is higher in north region of china.The recommending optimal ranges should be 12～18 kg,10.0～16.0 kg and 8.0～14.0 kg for the three categories respectively.