CE	chronic endometritis
RPL	recurrent pregnancy loss
RIF	recurrent implantation failure
OH	outpatient hysteroscopy
AUB	abnormal uterine bleeding
PCD	plasma cell density
CSD	cesarean scar defect
RT-PCR	real-time polymerase chain reaction
RPOCs	retained products of conception
HPF	high-power field
AUC	area under curve
ROC	receiver operating characteristic curve