EP4	prostaglandin E2 receptor 4
EVTs	extravillous trophoblast cells
uRM	unexplained recurrent marriage
cAMP	cyclic adenosine monophosphate
PKA	cAMP-dependent protein kinase A
HCG	human chorionic gonadotropin
IL	interleukin
pCREB	phosphorylating CREB
ESHRE	European Society of Human Reproduction and Embryology
APS	antiphospholipid syndrome
PGE2	Prostaglandin E2
EP	G-protein-coupled EP receptors
HLA-G	human leukocyte antigen G
OD	optical density
PPAR	peroxisome proliferator-activated receptors
IHC	immunohistochemical
ABC	Avidin-Biotin Complex
IRS	immunoreactive score
RT-PCR	real-time polymerase chain reaction
iEVT	invasive extravillous trophoblast
EPAC	exchange protein directly activated by cAMP
PKA	cAMP-dependent protein kinase A
CREB	cAMP response element–binding protein
AMPK	AMP-activated protein kinase
LH	luteinizing hormone
GCM-1	chorion-specific transcription factor-1