fraternal birth-order effect

A form of fraternal birth order effect — The scientific observation that a man's statistical probability of being homosexual increases with the number of older brothers he has.

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Meanings

nounfraternal birth-order effect (uncountable)
  1. alternativeuncountableAlternative form of fraternal birth order effect.
Cite this entry
APA

fraternal birth-order effect. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/fraternal%20birth-order%20effect

MLA

“fraternal birth-order effect.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fraternal%20birth-order%20effect. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “fraternal birth-order effect,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/fraternal%20birth-order%20effect.

Source: fraternal birth-order effect on Wiktionary, CC BY-SA 4.0.