PSV UMB	peak systolic velocity of umbilical artery
OR	odds ratio
NICU	neonatal intensive care unit
IVCT	isovolumetric contraction time
IVRT	isovolumetric relaxation time
ET	ejection time
UMB PI	umbilical artery pulsatility index
AFI	amniotic fluid index
EFW	estimated fetal weight
LGA	larger for gestational age
SGA	smaller for gestational age
AGA	appropriate for gestational age
RDS	neonatal respiratory distress syndrome
ROC	receiver operating characteristic curve
LV Tei	Tei index for the left ventricle
RV Tei	Tei index for the right ventricle
AUC	area under curve
EDV	end-diastolic velocity
PI	pulsatility index
RI	resistance index
CTAR	cardiothoracic area ratio
FHR	fetal heart rate