Objective:
To obtain the nomogram of the fetal humerus length (HL) at 18-24 weeks of gestation.
Material and Methods:
This retrospective study involved 349 pregnant women between 18-24 weeks’ gestation. Fetal biometric measurements were obtained by transabdominal ultrasound. The distributions of HL and percentile values were established according to 18-24 gestational weeks (GW). Correlation co efficients and associated P values for the relationships between the HL, GW and other biometrical parameters were defined.
Results:
Median values of humerus length between 18-24 weeks were 25,28,31,33,35,37, and 39 mm respectively. Statistically significant correlation was found between the HL and GW (r2=0.908; P<0.001), biparietal diameter (r2=0.89; P<0.001), femur length (r2=0.947; P<0.001), head circumference (r2=0.930; P<0.001), and abdominal circumference (r2=0.911; p<0.001).
Conclusion:
The HL nomogram obtained at 18-24 gestational weeks from our patient population show conformity with the other humerus length nomograms used worldwide.
Keywords: humerus, nomogram, fetus