What about gr/gr deletions and male infertility? Systematic review and meta-analysis

Y chromosome gr/gr deletions are a risk factor for low semen quality

(2009) L. Visser et al.   HUMAN REPRODUCTION

Differential effect of specific gr/gr deletion subtypes on spermatogenesis in the Chinese Han population

(2009) Y. Yang et al.   INTERNATIONAL JOURNAL OF ANDROLOGY

Y-chromosome AZFc structural architecture and relationship to male fertility

(2008) Celia Ravel et al.   FERTILITY AND STERILITY

New binary polymorphisms reshape and increase resolution of the human Y chromosomal haplogroup tree

(2008) T. M. Karafet et al.   GENOME RESEARCH

Partial AZFc deletions and duplications: clinical correlates in the Italian population

(2008) Claudia Giachini et al.   HUMAN GENETICS

The b2/b3 subdeletion shows higher risk of spermatogenic failure and higher frequency of complete AZFc deletion than the gr/gr subdeletion in a Chinese population

(2008) C. Lu et al.   HUMAN MOLECULAR GENETICS

Y chromosome haplogroups may confer susceptibility to partial AZFc deletions and deletion effect on spermatogenesis impairment

(2008) Yuan Yang et al.   HUMAN REPRODUCTION

Do we need to search for gr/gr deletions in infertile men in a clinical setting?

(2008) K. Stouffs et al.   HUMAN REPRODUCTION

A Frequent Partial AZFc Deletion does not Render an Increased Risk of Spermatogenic Impairment in East Asians

(2005) F. Zhang et al.   ANNALS OF HUMAN GENETICS