Infants who look like their father at birth are healthier one year later. The reason is such father–child resemblance induces a father to spend more time engaged in positive parenting. An extra day (per month) by a typical visiting father enhances child health by just over 10% of standard deviation.

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Infants who look like their father at birth are healthier one year later. The reason is such father–child resemblance induces a father to spend more time engaged in positive parenting. An extra day (per month) by a typical visiting father enhances child health by just over 10% of standard deviation.