References

% of obstructive azoospermia

Rashed et al. (2008)

24

Wong et al. (1973)

25

Colgan et al. (1980)

20

Brannen and Roth (1979)

35

Al-Rayess et al. (2000)

31

Thomas J (1990)

38

Meinhard et al. (1973)

5

Haddad et al. (2004)

11.2

Present study (2015)

17.9