Genes may explain why children who live without dads have earlier sex

Daughter and FatherPrevious research has found that children raised in homes without a biological father have sex earlier than children raised in traditional nuclear families. Now a new study that used a novel and complex design to investigate why this is so challenges a popular explanation of the reasons.

Among prior explanations of why children who live in homes without fathers have sex earlier are that early childhood stress accelerates children’s physical development, that children who see their parents dating may start dating earlier, and that it’s harder for a single parent to monitor and supervise children’s activities and peers. All of these are environmental explanations.

"Our study found that the association between fathers’ absence and children’s sexuality is best explained by genetic influences, rather than by environmental theories alone," according to Jane Mendle, assistant professor of psychology at the University of Oregon, who led the study.

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