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    Studie zeigt, dass Hitze mit weniger männlichen Geburten in Afrika verbunden ist

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    7 Kommentare

    1. Thespiritdetective1 on

      Global warming causes an increase in female births is certainly an interesting concept

    5. palsh7 on

      Wasn’t there just a comment or post in the past 24 hours referencing Aristotle’s theory about heat causing female births?

    6. Milestogob4Isl33p on

      Same thing happens with famine and other stressful events, like social upheaval. Male fetuses are weaker than female fetuses, and culling them early might be an evolutionary strategy.   

    7. lanternhead on

      This paper has similar findings

      https://pubmed.ncbi.nlm.nih.gov/33006607

      > Observational, descriptive cross-sectional study with a duration of 3 months… Seventy-five male professional soccer players from First Division soccer teams. Offspring variables were sex of the offspring, number of children and order of birth. Exercise training variables were volume and intensity… Total offspring was 122 children (52 males (42.6%), 70 females (57.4%)). Analysis revealed that increase in either the volume (P < 0.001) or intensity (P < 0.001) of training by the players shifted the birth offspring ratio more toward females.

      There has been a lot of conjecture about the effect of environmental conditions on sex ratios (either by selection vs sperm or selection vs fetuses). I don’t know if there have been any true large-scale studies on the topic though

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