I am not sure that’s the case.It doesn’t necessarily work that way though does it?
I find it a bit weird as looking at the deer foetuses from culled does won’t necessarily tell you what the sex of foetuses remain In The unculled does…..
Foetus sex is a bit of a lottery rather than by design isn’t it?
I thought research such as that by Hewison and Gaillard suggested that sex ratios of offspring were, in roe at least, affected by local resource competition. As body mass of fecund females rises, so the proportion of male embryos reduces.