As a prime example of international and cross-institutional cooperation, the working group. ‘Reproductive Genetics’ (AG Reproduktionsgenetik) succeeded in identifying a new gene named to be causative in male infertility. The results of extensive M1AP-related research, led by Margot Wyrwoll, Corinna Friedrich, and Frank Tüttelmann (Institute of Human Genetics, University of Münster) have recently been published in the prestigious American Journal of Human Genetics rendering these efforts the next leap in the discovery of male infertility causes.