More that the wombs of beautiful women tend to abort males, and the wombs of tall women tend to abort females. I'm kinda curious whether this can account for male genes at all; it seems possible but pretty unlikely.
And of course, the effect is incredibly tiny, but averaged over millions of human beings can create noticeable differences in sex ratios.
>The mechanism proposed is sex-selective abortion. Apparently, women's bodies have the ability to spontaneously abort fetuses of "the wrong" sex early in the pregnancy
Ah, thanks for clarifying. So then this doesn't account for height/beauty/etc. input from the male? I guess that still sort of makes sense.
does that mean therefore that there are NOT 3 billion females and 3 billion males in the world, since, if it is not just about the sperm race and our bodies have mechanisms to determine the chances of survival of the foetus, then it is no longer 50/50?
World-wide there are 107 men born for every 100 women. As women tend to get older the overall difference is 101/100. It also differs per country, and possibly other groupings.
The sperm race isn't 50/50 either. The y-sperm is slightly lighter than the x-sperm and thus slightly faster. On the other hand, women tend to live longer.
And of course, the effect is incredibly tiny, but averaged over millions of human beings can create noticeable differences in sex ratios.