Married women with children experience greater intrasexual competition than their male counterparts

Darwin, C. The Descent of Man and Selection in Relation to Sex (John Murray, 1871).

Book 

Google Scholar 

Janicke, T. et al. Darwinian sex roles confirmed across the animal kingdom. Sci. Adv. 2(2), e1500983 (2016).

Article 
PubMed 
PubMed Central 

Google Scholar 

Trivers, R. L. Parental investment and sexual selection. In Sexual Selection and the Descent of Man 1871–1971 (ed. Campbell, B.) 136–179 (Aldine Publishing Company, 1972).

Google Scholar 

Benenson,…