Are AZFb deletions always incompatible with sperm production?

Complete Azoospermia Factor b Deletion of Y Chromosome in an Infertile Male With Severe Oligoasthenozoospermia: Case Report and Literature Review

(2017) Yong-Sheng Zhang et al.   UROLOGY

EAA/EMQN best practice guidelines for molecular diagnosis of Y-chromosomal microdeletions: state-of-the-art 2013

(2013) C. Krausz et al.   Andrology

European Association of Urology Guidelines on Male Infertility: The 2012 Update

(2012) Andreas Jungwirth et al.   EUROPEAN UROLOGY

AZFb microdeletions and oligozoospermia—which mechanisms?

(2012) Ana Rita Soares et al.   FERTILITY AND STERILITY

Transmissible microdeletion of the Y-chromosome encompassing two DAZ copies, four RBMY1 copies, and both PRY copies

(2010) Ingrid Plotton et al.   FERTILITY AND STERILITY

Complete deletion of the AZFb interval from the Y chromosome in an oligozoospermic man

(2010) G. Longepied et al.   HUMAN REPRODUCTION