Fig. 4From: Effects of single and multiple transplantations of human umbilical cord mesenchymal stem cells on the recovery of ovarian function in the treatment of premature ovarian failure in miceThe comparison of ovarian proliferation potential in each group. Immunohistochemistry for KI67 in once intravenous group (a, c) and the multiple intravenous group (b, d). Sham mice follicle highly expressed KI67, POF mice follicle lacked KI67 signal, the expression was observed in MSCs group. Original magnification: 400 × . n = 5. 1xMSC: Single transplantation of hUC-MSC; 3xMSC: Multiple transplantation of hUC-MSCBack to article page