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KMID : 0352519830200030047
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Korea Univercity Medical Journal
1983 Volume.20 No. 3 p.47 ~ p.53
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Birth Weights for Gestational Age of Korean Neonates in Seoul
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金鶴壽/Kim, Hak-Soo
洪性鳳/李壽鍾/Hong, Sung-Bong/Lee, Soo-Chong
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Abstract
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Measurements of birth weights bear a clinical importance in assessment of fetal growth and prediction of well-being of neonates. Although the nomogram of the fetal weight reported by Lubchenco and her colleagues has been utilized as the reference to fetal growth in western hemisphere, it is hardly applicable for Korean neonates as the fetal growth is influenced by several factors such as ethnic qroup, socioeconomic backgrounds and etc. This study is thus attempted to establish standard values of birth weight according to the gestational age for Korean neonates.
Data were collected from five general hospitals in Seoul during the period from February, 1975 to May, 1977. Of all neonates those with uncertain memory of last menstrual period, those with multiple pregnancies and those with gestational duration of 31 weeks or less and 45 weeks or more who were inappropriate for statistical analysis due to insufficient sample size were exclued from the study. Thus measurements of birth weights for 2016 neonates were computed and analysed for the mean birth weights according to gestational weeks as well as those at percentiles of the loth, 25th, 5oth, 75th, and the nomogram for weight was constructed.
The results were as follows:
1. Of all neonates 29. 5% were born at 40 weeks of gestation, 25. 1% at 39 weeks, 15.8% at 41 weeks respectively. Thus 70% of newborns were delivered during 3 weeks between 39 and 41 completed weeks of gestation. The proportion of newborns delivered in fullterm was 88.9%, in preterm 7.6%, and in postterm 3.4% respectively.
2. The highest increment rate of birth weight by week was :observed during 37 weeks by 9.1% with the weight gain of 250 gm compared with that of the previous gestational week. For 10 weeks between 32 and 42 weeks of gestation a fetus gained weight by 978gm averaging 97. 8gm per week while some decrement of weight was noticed during 43 and 44 weeks.
3. The mean birth weights of newborns were 2, 455600gm at 32 weeks, 2, 750596gm at 36 weeks, 3, 335554gm at 40 weeks, 3, 433459gm at 42weeks, and 3, 388429gm at 44 weeks. The weights at the percentiles of the 10th, 25th, 50th, 75th, and 90th of the corresponding gestational age were calculated and the nomogram for the birth weight of newborns delivered in Seoul was constructed.
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