If it implies humans are unusual, this is poor framing: AIUI all the domesticated species (h sap included) have 1:1 ratios. For dairy farmers in particular, this means almost all male calves are byproducts, to be monetised somehow.<p>"I'll be here all week. Try the veal."<p>Lagniappe: <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6680155/" rel="nofollow">https://pmc.ncbi.nlm.nih.gov/articles/PMC6680155/</a>