The optimal cut-off values of CD56 and CD38 were taken based on the ROC curve to explore their diagnosis value for CE and predictive value for pregnancy outcomes.<h4>Results</h4>Among the 844 patients, the levels of CD56 and CD38 in the CE group were both higher than those in the non-CE group (<i>P</i> < 0.05). Here, NCAM1 is linked to cholesteryl ester measurement.