Hassan Mahasin G
Department of Radiological Sciences, College of Health and Rehabilitation Sciences, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia.
J Med Ultrasound. 2022 Jul 19;31(2):133-136. doi: 10.4103/jmu.jmu_26_22. eCollection 2023 Apr-Jun.
Ethnicity can influence organ measurements, so each ethnicity should provide normal references. The study was conducted to measure the normal ranges of humeral and femoral diaphysis lengths, to compare them during the third trimester of pregnancy in the Saudi population, and to identify their role in estimating fetal age.
This cross-sectional study was conducted among 60 normal singleton pregnant females in the third trimester. The fetal humeral length (HL) and femur length (FL) were taken during ultrasound scanning for follow-up. The IBM Statistical Package for the Social Sciences Version 23 was used to summarize the data and to compare both the lengths with the last menstrual period (LMP) using Pearson's correlation. The comparison was considered statistically significant if < 0.05.
The mean humeral and femoral diaphysis lengths ± standard deviations were 4.84 ± 1 cm and 5.54 ± 1.2 cm, respectively. A positive linear correlation was present between the length and LMP. The correlation of HL with LMP ( = 0.828) was higher than that of FL with LMP ( = 0.770). HL and FL were correlated. They showed a Pearson's coefficient of 0.941. The study revealed that gender does not affect fetal HL and FL.
Normal reference ranges for femur and humeral diaphysis lengths during the third trimester were provided. The humerus can be used to assess fetal age. Humerus and femur were correlated to each other among Saudi fetuses. Another study with a larger sample size is recommended.
种族可影响器官测量结果，因此每个种族都应提供正常参考值。本研究旨在测量肱骨和股骨干长度的正常范围，比较沙特人群妊娠晚期的这些指标，并确定它们在估算胎儿年龄中的作用。
本横断面研究纳入了60例妊娠晚期的正常单胎孕妇。在超声检查随访时测量胎儿肱骨长度（HL）和股骨长度（FL）。使用IBM社会科学统计软件包第23版汇总数据，并采用Pearson相关性分析比较这两个长度与末次月经日期（LMP）的关系。若P<0.05，则认为比较具有统计学意义。
肱骨和股骨干长度的平均值±标准差分别为4.84±1 cm和5.54±1.2 cm。长度与LMP之间存在正线性相关性。HL与LMP的相关性（r=0.828）高于FL与LMP的相关性（r=0.770）。HL和FL相关，它们的Pearson系数为0.941。研究表明，性别不影响胎儿的HL和FL。
提供了妊娠晚期股骨和肱骨干长度的正常参考范围。肱骨可用于评估胎儿年龄。沙特胎儿的肱骨和股骨相互相关。建议进行另一项样本量更大的研究。
