Fig. 2From: Melatonin in cryopreservation media improves transplantation efficiency of frozen–thawed spermatogonial stem cells into testes of azoospermic miceFlow cytometry analysis for intracellular ROS assay in SSCs. a Graphs show the percentage of positive ROS cells in different groups SSCs. b ROS generation results in freeze, freeze + Mel (100 μM) and fresh groups, analyzed by flow cytometry. The results are presented as mean ± SD. ***p < 0.001Back to article page