Histopathological assessment of treatment efficacy with MSCs for hormone-induced ANFH. Eigth weeks after MSC transplantation, HE staining results of histological examination (A) were semi-quantified for hematopoietic tissue in the medullary cavity (B) and empty lacunae in the trabeculae (C). n = 15 or 30/group (3 sections/animal, 5 or 10 animals/group). *, P < 0.05 versus the ANFH group. #, P < 0.05 versus the MSCs + FG group.