Table 1.

Variables and data stored for each SWE examination. ROI (region of interest)

Maternal	Fetal	Technical
Age (years)	Presentation: Cephalic Breech Transverse	Young’s modulus (kPa) in nine ROI: Proximal lung: P1, P2, P3 Distal lung: D1, D2, D3 Liver: IV, V, VI
Weeks of gestation	Estimated fetal weight (grams)	Distance between probe and target ROI for each measurement (cm)
Body mass index (kg/m2)	Placenta: Position: anterior, posterior, lateral, fundal Thickness (cm)	Biophysical safety indices: Mechanical index (Mi) Thermal index (Ti)
Subcutaneous adipose tissue thickness (cm)	Amniotic fluid index (cm)