BRD2 and male infertility: The FSH-lowering allele has previously been found to be associated with male infertility (Grigorova et al., 2008, 2010; Tuttelmann et al., 2012; Simoni and Casarini, 2014), but we found no association with males who had never fathered a child suggesting a female-specific effect, although this may because the phenotype includes males who chose not to have children in addition to infertile males.