This is plausibly consistent with evolutionary pressures towards making women more tolerable to children’s aversive behaviour during childcare, given previous findings that oxytocin plasma levels during pregnancy and the first month postpartum correlate with higher levels of behavioural and psychological bonding with the infants (Feldman et al., 2007), and that oxytocin may be released to reduce stress and anxiety in mothers with low sensitivity and ability to cope with their infants, thus promoting care and bonding (Elmadih et al., 2014). The gene discussed is OXT; the disease is Anxiety.