Normal allele: AA
There is an increased risk of azoospermia (lack of sperm) and therefore male infertility.
Polymorphism rs3129878 is related to topics like this:
Research and publications:
19846760 Mapping of multiple susceptibility variants within the MHC region for 7 immune-mediated diseases.
23934009 HLA-DPB1*04:01 allele is associated with non-obstructive azoospermia in Japanese patients.
27597543 Association and meta-analysis of HLA and non-obstructive azoospermia in the Han Chinese population.