Objective To discuss the correlation of fetal shorter femur and clinical prognosis.Methods 40 fetuses with shorter femurs were analyzed.Results The length of both femurs of the fetuses was shorter than 2-fold average standard deviation of femu.4, 24, 12 and 40 cases occurred at week 24 , 28-30 and 31-34th, respectively.The difference of shorter femurs was 0.2, 0.3, 0.4, 0.5, 0.6 and 0.7cm, respectively.Of the 40 cases, 37 shown no abnormality on appesrance, 1 cases with low weight and 2 cases with 21-trisomy sydrome.Conclusion It is more accurate on clinical prognosis if the femurs length is within the region of 0.5cm lower than 2-fold average standard deviation of regular gestational weeks.However, when occurring at the middle stage, the risk of chromosome abnormality is largely increased if the values exceed this region.%目的 探讨胎儿股骨偏短与临床预后的相关性.方法 2008年4月～2010年9月在成都市妇女儿童中心医院进行产前超声检查的孕妇中,检出40例胎儿股骨偏短,并与出生后的结果比较,进行临床评估.结果 40例均为双侧股骨测量值低于平均值的2倍标准差以上、骨骼形态正常.24、28～30、31～34周分别出现4、24、12例.股骨偏短差值分别为0.2、0.3、0.4、0.5、0.6、0.7 cm.出生结果37例正常新生儿、1例低体重儿、2例21-三体征.结论 胎儿孕晚期发生股骨偏短、其测值低于正常孕周平均值2倍标准差0.5cm以内者,临床预后好,0.5 cm以上并在孕中期发生者,染色体异常的风险明显增大.
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