Analysis of insulin positive MMc revealed enrichment of maternal cells among the beta cell fraction in the islets of T1D pancreases (2.34±0.5%, n = 5 in T1D samples vs. 0.66±0.2%, n = 5 in control samples) (two tailed t test, p = 0.0166) (Figure 4b). Here, INS is linked to type 1 diabetes mellitus.