Ang II	Angiotensin II
AZA	5-aza-2′deoxycytidine
cGMP	cyclic guanosine monophosphate
dNK	decidual NK cells
GMP	guanosine monophosphate
idNK	induced decidual NK cells
IL	interleukin
IUR	intrauterine growth restriction
L-MNNA	NG-Monomethyl-L-arginine
NO	nitric oxide
NOS	nitric oxide synthase
PBS	phosphate-buffered saline
PDE-Is	phosphodiesterase inhibitors
PDEs	phosphodiesterases
RAS	renin–angiotensin system
RPL	recurrent pregnancy loss
RSA	recurrent spontaneous abortions
SC	sildenafil citrate