Table 2. Percentage of sperm retrieval rates (SRR) in men with non-obstructive azoospermia according to the histological diagnosis using conventional TESE (cTESE) or microsurgical TESE (mTESE).

Study	SRR (%)
	Hypospermatogenesis		Maturation arrest		Sertoli cell-only syndrome
	cTESE	mTESE	cTESE	mTESE	cTESE	mTESE
Okada et al.33	0	100	38	75	6	34
Ramasamy et al.40	50	81	20	44	29	41
Tsujimura et al.41	77	100	0	75	13	23