Do parents with daughters live longer?

Daughters increase fathers' longevity by 74 weeks per daughter, while both daughters and sons equally reduce mothers' longevity by 95 weeks each. Research suggests that men with daughters tend to live longer than those who don't. A study by the Jagiellonian University of Poland found that for every daughter a man has, his life expectancy can increase by approximately 74 weeks. The study's key finding is that fathers with daughters tend to live longer, and an intriguing trend is emerging: the more daughters a father has, the more likely he is of living.

In fact, data suggests that for every daughter born, the father's life expectancy is extended by an average of 74 weeks. While the study doesn't have a clear answer, it provides us with some interesting ideas about why this might happen. We showed for the first time that the number of daughters was positively related to their parents' longer life expectancy, increasing their longevity by an average of 74 weeks per daughter born, while the number of sons had no significant effect on paternal longevity.