O [[canibalismo intrauterino]] é un comportamento que presentan algunhas especies carnívoras, nas cales se forman moitos embrións, pero só nacen un ou dous. Os maiores e máis fortes comen os outros menos desenvolvidos como unha fonte de nutrientes en estado embrionario.
[[Sibling rivalry (animals)#Intrauterine cannibalism|Intrauterine cannibalism]] is a behaviour in some carnivorous species, in which multiple embryos are created at impregnation, but only one or two are born. The larger or stronger ones consume their less-developed siblings as a source of nutrients.
InNa '''adelphophagyadelfofaxia''' orou '''embryophagyembriofxia''', theo fetusfeto eatscome siblingos embryosembrións dos seus irmáns, whilementres inque na [[oophagyoofaxia]] it feedsaliméntase onde eggsovos.<ref>[[Thierry Lodé]] 2001. Les stratégies de reproduction des animaux (reproduction strategies in animal kingdom). Eds Dunod Sciences, Paris</ref><ref name=crespi>{{cite journal | last = Crespi | first = Bernard |author2=Christina Semeniuk | title = Parent-Offspring Conflict in the Evolution of Vertebrate Reproductive Mode | journal = The American Naturalist | volume = 163 | issue = 5 | pages = 635–654 | year = 2004 | doi = 10.1086/382734 | id = | pmid = 15122484 }}</ref>
AdelphophagyA occursdelfofaxia inocorre somenalgúns marinegasterópodos gastropodsmariños ([[calyptraeidcaliptreidos]]s, [[muricidmurícidos]]s, [[vermetidvermétidos]]s,ande [[buccinidbuccínidos]]s) ande in some marinenalgúns [[annelidanélidos]]s mariños (''[[Boccardia proboscidia]]'' inen [[Spionidae]]).<ref>Thomsen O., Collin R. & Carrillo-Baltodano A. (2014). "The Effects of Experimentally Induced Adelphophagy in Gastropod Embryos". ''[[PLoS ONE]]'' '''9'''(7): e103366. {{doi|10.1371/journal.pone.0103366}}.</ref>
IntrauterineSábese cannibalismque ishai knowncaniblismo tointrauterino occuren intiburóns [[Lamniformes|lamnoid sharkslamniformes]]<ref>{{cite journal | last = Hamlett | first = William C. |author2=Allison M. Eulitt |author3=Robert L. Jarrell |author4=Matthew A. Kelly | title = Uterogestation and placentation in elasmobranchs | journal = Journal of Experimental Zoology | volume = 266 | issue = 5 | pages = 347–367 | year = 1993 | url = | doi = 10.1002/jez.1402660504 | id = | accessdate = }}</ref> suchcomo as theo ''[[sandCarcharias tiger sharktaurus]]'', ande inna thepíntega ''[[FireSalamandra Salamandersalamandra]]'',<ref>{{cite book | last = Stebbins | first = Robert C. | authorlink =Robert C. Stebbins |author2=Nathan W. Cohen | title = A Natural History of Amphibians | publisher = Princeton University Press | year = 1995 | location = Princeton, NJ | isbn = 0-691-10251-1 | page = 9 }}</ref> ase welltamén asnalgúns in some [[teleost]]peixes fishesteleósteos.<ref name="crespi"/> TheAs [[Carboniferousquimera]]s period [[chimaera]],fósiles ''[[Delphyodontos]] dacriformes'',isdo suspected[[Carbonífero]] ofsospéitase havingque practicedpracticaban intrauterineo cannibalism,canibalismo alsointrauterino, duedebido toaos theafiados sharpentes teethdos ofxuvenís the recently bornneonatos (orou possiblyposiblemente abortedabortados) juveniles, ande thea presencepresenza ofde materia [[fecal]] matternos inintestinos the juveniles'dos intestinesxuvenís.<ref>Lund, R. 1980. Viviparity and intrauterine feeding in a new holocephalan fish from the Lower Carboniferous of Montana. Science, 209: 697‑699.</ref>
