ACE	angiotensin-converting enzyme
AGA	appropriate for gestational age
Ang	angiotensin
AT-1	angiotensin II type 1
AT-2	angiotensin II type 2
AVA	arterio–venous anastomosis
CA	carbonic anhydrous
DVM	delayed villous maturation
ET-1	endothelin-1
FD	fetal demise
FC	fold changes
FGR	fetal growth restriction
FLP	fetoscopic laser photocoagulation
FTV	fetal thrombotic vasculopathy
HIF-1α	hypoxia inducible factor 1α
HMOX1	heme oxygenase 1
IGF	insulin-like growth factor
IRI	ischemia-reperfusion injury
LC3	light chain 3
MC	monochorionic
MCA-PSV	middle cerebral artery peak systolic value
MDA	malondialdehyde
mtDNA	mitochondrial DNA
NFE2L2	nuclear factor erythroid 2 like 2
OS	oxidative stress
PE	preeclampsia
PlGF	placental growth factor
RAS	renin–angiotensin system
RI	resistance index
ROS	reactive oxygen species
sENG	soluble endoglin
sFGR	selective fetal growth restriction
sFlt1	soluble fms-like tyrosine kinase 1
StO2%	tissue venous oxygenation
TAPS	twin anemia-polycythemia sequence
TTTS	twin-to-twin transfusion syndrome
VEGF	vascular endothelial growth factor
Δ	delta