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Fraternal birth order, also known as the older brother effect, has been correlated with male sexual orientation, with a significant volume of research finding that the more older brothers a male has from the same mother, the greater the probability he will have a homosexual orientation.
15 Σεπ 2024 · At its core, the older brother effect refers to the unique impact that firstborn males have on their younger siblings’ development and family dynamics. It’s not just about who gets the bigger bedroom or the last slice of pizza (though those battles are certainly part of the equation).
23 Αυγ 2023 · The fraternal-birth order effect (FBOE) is a research claim which states that each older brother increases the odds of homosexual orientation in men via an immunoreactivity process known as the maternal immune hypothesis. Importantly, older sisters supposedly either do not affect these odds, or affect them to a lesser extent.
23 Νοε 2017 · The fraternal birth order effect is the tendency for older brothers to increase the odds of homosexuality in later-born males.
18 Μαρ 2020 · The fraternal birth order effect (FBOE) is the finding that older brothers increase the probability of homosexuality in later-born males, and the female fecundity effect (FFE) is the finding that the mothers of homosexual males produce more offspring than the mothers of heterosexual males.
15 Απρ 2024 · The effect is cumulative: The more older brothers someone has, the bigger it is. If you have one older brother, your probability of being gay nudges up to about 2.6%.
1 Ιαν 2022 · The Fraternal Birth Order Effect (FBOE) is the well-established finding that each biological older brother a male has increases the likelihood that he will be same-sex attracted.
