SDC1 and cholesteryl ester measurement: The prevalence of CE (CD138+ <3 plasma cells/10mm2) was 20 % in controls and 22 % in women with RPL. With Liu’s method the potential influence of this condition was excludedThe mean number of CD16+ cells was significantly increased in the endometrium of uRPL patients compared to controls(p < 0.001). No differences were observed in the mean values of CD45 (p = 0.06), CD56 (p = 0.99), and CD57 (p = 0.14). By additional analysis of these markers showed their differentdistributions in uRPL patients (p < 0.001 for CD45, CD56, and CD16; p = 0.003 for CD57) comparedto controls