CRUI	Cervical Ripening Ultrasound Index
CL	Cervical Length
PCA	Posterior Cervical Angle
CES	Cervical Echogenicity Score
PF	Presence of Funneling
ROC	Receiver Operating Characteristic
BMI	Body Mass Index
AUC	Area Under the Curve
NICU	Neonatal Intensive Care Unit
EFW	Estimated Fetal Weight
CI	Confidence Interval
OR	Odds Ratio
HPA	Hypothalamic–Pituitary–Adrenal (axis)
PlGF	Placental Growth Factor
sFlt-1	Soluble fms-like tyrosine kinase-1