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E.g. only 3% of all children in the U.S. live with a step father.<ref>https://ifstudies.org/blog/more-than-60-of-u-s-kids-live-with-two-biological-parents/</ref> | E.g. only 3% of all children in the U.S. live with a step father.<ref>https://ifstudies.org/blog/more-than-60-of-u-s-kids-live-with-two-biological-parents/</ref> | ||
Non-paternity rates are sometimes high in hunter-gatherers though and the men in such societies also often do not invest much in their offspring beyond childhood.<ref>https://pdfs.semanticscholar.org/0caa/60bcadd5768c6619ec01dbe1f6d77a93ffbc.pdf</ref><ref>https://en.wikipedia.org/wiki/Sex_at_Dawn</ref> | Non-paternity rates are sometimes high in hunter-gatherers though and the men in such societies also often do not invest much in their offspring beyond childhood.<ref>https://pdfs.semanticscholar.org/0caa/60bcadd5768c6619ec01dbe1f6d77a93ffbc.pdf</ref><ref>https://en.wikipedia.org/wiki/Sex_at_Dawn</ref> | ||
=== Conclusion === | === Conclusion === |