Hospital Garcia de Orta, EPE, Avenida Professor Torrado da Silva, Pragal, 2801-951 Almada, Portugal.
Forensic Sci Int. 2013 Sep 10;231(1-3):397.e1-5. doi: 10.1016/j.forsciint.2013.05.039. Epub 2013 Jul 2.
The estimation of gestational age (GA) on fetal remains can be an important forensic issue. Forensic specialists usually use reference tables and regression equations derived from reference collections, which are quite rare in what fetuses are concerned. Since these tools are mostly grounded on ultrasonographic measurements, which are known to differ from real bones measurements or are based on ancient literature, this study aimed the construction of tables and regression equations for the Portuguese population on the basis of diaphyseal bone length measurements (femur, tibia and humerus) of 100 fetuses of known GA, using post-mortem radiographs. There is a strong correlation between the longitudinal length of studied bones and GA; the femur exhibits the strongest correlation (r=0.969; p=0.000), followed by the tibia (r=0.966; p=0.000) and the humerus (r=0.963; p=0.000). Therefore it was possible to obtain regression equations and to build tables with reference values for each of the diaphysis analyzed.
胎儿残骸的孕周（GA）估计可能是一个重要的法医学问题。法医专家通常使用来自参考资料的参考表和回归方程，而这些参考资料在胎儿方面非常罕见。由于这些工具主要基于超声测量，而超声测量与实际骨骼测量不同，或者基于古代文献，因此本研究旨在根据 100 名已知 GA 的胎儿的骨干长度测量值（股骨、胫骨和肱骨），使用死后 X 光片，为葡萄牙人群构建表格和回归方程。研究中骨骼的纵向长度与 GA 之间存在很强的相关性；股骨的相关性最强（r=0.969；p=0.000），其次是胫骨（r=0.966；p=0.000）和肱骨（r=0.963；p=0.000）。因此，我们可以获得回归方程，并为每个分析的骨干构建参考值表格。
