there is a perceived or known increase in sperm competition risk. Sperm competition is not exclusive to humans, and has been studied extensively in other...

Sperm competition is the competitive process between spermatozoa of two or more different males to fertilize the same egg during sexual reproduction....

success and minimise sperm competition.[unreliable medical source?][unreliable medical source?] Sperm competition has caused the human penis to evolve in...

Sperm Wars is a popular science book by evolutionary biologist Robin Baker about sperm competition. Originally published in English in 1996, it has since...

types in the adult human body Female sperm Female sperm storage Mendelian inheritance Polyspermy Sperm competition Sperm granuloma Sperm theft "Spermatium...

a Sperm Competition Strategy in Humans]". Evolutionary Psychology. 2 (5): 12–23. doi:10.1177/147470490400200105. Dean, Dr. John. "Semen and sperm quality"...

humiliation Female dominance Female promiscuity Feminization (activity) Human sperm competition Kuckuckskind Monogamish Netorare Non-paternity event Open marriage...

increase the likelihood of success of their own sperm fertilizing the eggs of females when competition is involved. Mate guarding behaviour can be pre-...

evolution of human sexuality. New York: Oxford University Press. Smith, R. L. (1984). Human sperm competition. In R. L. Smith, Sperm competition and the evolution...

München. Baker, Robin R.; Bellis, Mark A. (November 1993). "Human sperm competition: Ejaculate adjustment by males and the function of masturbation"...

W.; Firman, R.E.C.; Rhodes, G.; Peters, M. (2004). "Human sperm competition: testis size, sperm production and rates of extrapair copulations". Animal...

bestseller Sperm Wars which was based on his own lab's original research on human sexuality. His work and ideas on the evolution of human behaviour have...

PMID 15216425. S2CID 16965002. Baker, R. R.; Bellis, M. A. (1995). Human sperm competition. London, England: Chapman & Hall. Barr, Alicia; Bryan, Angela;...

W.; Firman, R.E.C.; Rhodes, G.; Peters, M. (2004). "Human sperm competition: testis size, sperm production and rates of extrapair copulations". Animal...

Craig W. (2005-03-01). "Mate retention, semen displacement, and human sperm competition: a preliminary investigation of tactics to prevent and correct...

male bilaterians, including humans, and is homologous to the ovary in females. Its primary functions are the production of sperm and the secretion of androgens...

primates, including women, to encourage her partner to produce good-quality sperm during the mating process. Copulatory vocalizations usually occur during...

explain humans' relatively large penis length and girth include a sperm competition hypothesis and a mate competition hypothesis. The sperm competition hypothesis...

pressures of sperm competition. Such a situation is often deleterious to the female: in other words, the male–male competition among sperm spills over...

1016/0003-3472(95)80014-X. S2CID 44103857. Baker RR, Bellis MA (1993). "Human sperm competition: Ejaculate manipulation by females and a function for the female...

heterogamy that applies to humans and other mammals. The human ovum has approximately 100,000 times the volume of a single human sperm cell. The type of gamete...

Smith, Robert L. (2005). "Human sperm competition". In Shackelford, Todd K.; Pound, Nicholas (eds.). Sperm Competition in Humans: Classic and Contemporary...

rivals. It has been observed in many non-human animals (see mate guarding and sperm competition), as well as humans. Sexual jealousy is a prime example of...

introduction of sperm (semen) into a female or hermaphrodite's reproductive system in order to fertilize the ovum through sexual reproduction. The sperm enters...

factor in fertilization. The mating plug plays an important role in sperm competition and may serve as an alternative and more advantageous strategy to...

complement. Sperm heteromorphism is also called sperm polymorphism or sperm dimorphism (for species with two sperm types). Typically, only one sperm type is...

Ejaculation is the discharge of semen (the ejaculate; normally containing sperm) from the penis through the urethra. It is the final stage and natural objective...

selection, including sexual selection in humans, and in other mammals, consisting of male–male competition and mate choice that mold the development...

convention, organisms that produce smaller, more mobile gametes (spermatozoa, sperm) are called male, while organisms that produce larger, non-mobile gametes...

Livyatan is an extinct genus of macroraptorial sperm whale containing one known species: L. melvillei. The genus name was inspired by the biblical sea...