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KMID : 0358419960390020282
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Korean Journal of Obstetrics and Gynecology
1996 Volume.39 No. 2 p.282 ~ p.294
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Ultrasonic Measurement of the Fetal Femur Length by Gestational Age in Korean Pregnant Women
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박영자
박금자/유국영/이병관/강경일/정미정/신숙진
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Abstract
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Ultrasonography is popular method for evaluating fetuses well-being and the determination of their gestational age. Several studies revealed that gestational age is strongly correlated witht he femur length rather than the biparietal diameter.
The fetal biparietal diameter and femur length were measured by ultrasonography in 3,178 Korean pregnant women. We calculated the mean, standard deviation and percentiles for each gestational week, and performed a liner and quadratic regression
analysis.
1. The linear quadratic regression equation of the biparietal diameter for gestational ages were BPD=-3.4358+0.49768(GW)-0.00434(GW)*, (R*=0.986, p<0.05).
2. The linear quadratic regression equation for the femur length of the gestational ages were FL=-3.8783+0.41598(GW)-0.00326(GW)*(R2=0.982, p<0.05).
3. The linear quadractic regression equation for the gestational age of the femur length was GW=10.7113+0.2381(FL)+0.0019(GW)*(R*=0.980, p<0.05).
The predicted biparietal diameter and femur length were calculated using regression equations and compared with the findings from studies on western women.
4. Korean women's gestational age predicted by fetal femur length is delayed when compared to the western standard. Therefore it is reasonable to use a Korean standard for fetal femur length.
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