"Currently, it is unclear whether HCs influence actual mate choice and whether this has real-life consequences for potential offspring. Although HC use may negatively affect intra-couple behavior (Cobey et al., 2011, 2012; Havlíček and Roberts, 2009; Roberts et al., 2012; Vollrath and Milinski, 1995; Welling et al., 2012) and may alter preferences for MHC heterozygosity (Havlíček and Roberts, 2009; Roberts et al., 2008; Wedekind et al., 1995; Wedekind and Füri, 1997), which could hypothetically have negative consequences for future offspring (e.g., Reznikoff-Etievant et al., 1991), direct empirical evidence for these theoretical longitudinal consequences of HC use is lacking."