sentences:  Spousal homicide is more likely to be committed by males rather than females, which may make the ramifications of EPC more relevant to women.From an evolutionary perspective, females have to invest a lot more in their offspring than males due to prolonged pregnancy and child rearing, and a child has a better chance of survival and development with two parents involved in child-rearing.Therefore, extra-pair copulations have a greater cost for women because they put the support and resources that their mate can offer at risk by copulating outside the relationship.