Fig. 5

H&E staining of the testes before and after treatment. a The typical image of the testes specimens from OA patients. b The typical image in the first TESE. c-f The typical image of No response group, Response group 1, Response group 2A, Response 2B during the secondary TESE. Scale bar, 100 μm. Green color represented the Sertoli cells. The arrow indicated the mature sperm