Fetal ultrasound soft marker Short fetal humerus length 2012-03-17T07:07:05Z Short foetal humerus length Short fetal long bone in upper arm length HP:0011429 Short foetal long bone in upper arm length A short humerus length is defined as a length below the 2.5th percentile for gestational age or as a measurement less than 0.9 of that predicted by the measured biparietal diameter. The humerus should be measured with the bone perpendicular to the ultrasound beam and with epiphyseal cartilages visible but not included in the measurement (PMID:16100637). UMLS:C4023364 Abnormal fetal skeletal morphology