Temperature-related birth sex ratio bias in historical Sami: warm years bring more sons

Helle S, Helama S & Jokela J
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Helle, S., Helama, S., & Jokela, J. (2008). Temperature-related birth sex ratio bias in historical Sami: warm years bring more sons. Biology Letters, 4(1), 60-62. https://doi.org/10.1098/rsbl.2007.0482