Corpus Callosum Early GA

Percentile of corpus callosum length, gestational weeks 13–19.

Corpus Callosum Paladini

Percentile or Z-score (SD) of corpus callosum length, gestational weeks 15–37.

Head Circumference Chervenak

Z-score (SD) of fetal head circumference, gestational weeks 20–42.

Kidney Length Chitty

Percentile of fetal kidney length, gestational weeks 14–42.

Limb Bones Chitty

Percentile of humerus, radius, ulna, femur, tibia, fibula or foot length, gestational weeks 12–42.

Penile Length Perlitz

Z-score (SD) of fetal penile length, gestational weeks 14–35.

Fetal Thyroid Achiron

Percentile or Z-score (SD) of fetal thyroid width or circumference, gestational weeks 14–37.