On the Mathematics of the Fraternal Birth Order Effect and the Genetics of Homosexuality.

This article is devoted to the mathematical aspects of how these two phenomena are interconnected. In particular, we show that the fraternal birth order effect implies a correlation between homosexuality and maternal fecundity. Vice versa, we show that the correlation between homosexuality and female fecundity implies the increase in the probability of the younger brothers being homosexual. PMID: 31691074 [PubMed - as supplied by publisher]
Source: Archives of Sexual Behavior - Category: Psychiatry & Psychology Authors: Tags: Arch Sex Behav Source Type: research