ABSTRACT
OBJECTIVE: Mean weight gains, standard deviations were calculated for each gestational months and the 10th, 25th, 50th, 75th, and 90th percentiles were determined. And the influence of prepregnancy body mass index and/or parity on monthly weight gain was investigated. METHODS: We analyzed the monthly weight gain data from 876 women who had healthy sigleton term pregnancy in Han-il Hospital(Jul 2001-Jun 2002). Data were categorized in three groups according to the prepregnancy body mass index. RESULTS: The monthly weight gain table has been determined and 'Sigmoid(S) shaped' monthly weight gain curve was presented. Primipara and multipara have less weight gain than nullipara in the 5th and the 7th-11th months. Monthly weight gains adjusted for parity and age were significantly different among prepregnancy body mass index groups from the 4th month. CONCLUSIONS: More careful prenatal care according to the monthly weight gain-gestational month tables is needed to prevent a lot of complications which may be associated with abnormal weight gain during pregnancy.