WOI	Window of implantation
CG	Chorionic gonadotropin
IL	Interleukin
LIF IVF RIF	Leukemia inhibitory factor In vitro fertilization Recurrent implantation failure
ART	Assisted reproduction technology
ECM	Extracellular matrix
LH uNK	Luteinizing hormone Uterine natural killer
cAMP	Cyclic adenosine monophosphate
BCL-2 LHCGR	B-cell lymphoma 2 LH/CG receptor
COX2	Cyclooxygenase-2
PGES	Prostaglandin E synthase
Erk1/2	Extracellular signal-regulated protein kinases 1/2
PGE2 NOTCH1	Prostaglandin E2 Notch receptor 1
PR	Progesterone receptor
α-SMA	α-smooth muscle actin
IGFBP1	Insulin-like growth factor binding protein-1
ER	Oestrogen receptor
PRL	Prolactin
EGF	Epidermal growth factor
AREG	Amphiregulin
HB-EGF	Heparin binding epidermal growth factor
EREG	Epiregulin
JAG1	Jagged1
DLL	Delta-like
HES	Hairy enhancer of split
HEY1	Hes-related 1
ICM	Inner cell mass
FOXO1	Forkhead box protein O1
PKA	Protein kinase A
MMP	Matrix metalloproteinase
TH	Thyroid hormone
TR	Thyroid hormone receptor
TSHR	Thyroid-stimulating hormone receptor
DIO2	Type 2 deiodinase
LIFR	LIF receptor
ERA	Endometrial receptivity array
HESCs	Human endometrial stromal cells
Tregs	Regulatory T cells
IFN-γ	Interferon-γ
ISP1	Strypsin
ISP2	Lysin
JAK	Janus kinases
STAT	Signal transducer and activator of transcription protein
OPN	Osteopontin
MUC1	Mucin 1
E-cadherin	Endothelial cadherin
OB-cadherin	Osteoblast cadherin
CSF-1	Colony-stimulating factor-1
IUGR	Intrauterine growth restriction
TNFα	Tumor necrosis factor α
MCSF	Macrophage colony-stimulating factor
TGFβ	Transforming growth factor β
EGFL7	Epidermal growth factor-like domain 7
TIMPs	Tissue inhibitors of MMPs
PA	Plasminogen activator
PAI-1	Plasminogen activator inhibitor-1
uPA	Urokinase-type plasminogen activator