I don’t think you’ll find that in the genome.
There is a biological correlation between the reproductive rate and survival rate of a species. The higher chance that a species will survive, the lower the reproductive rate.
That is why, in the Western nations, the reproductive rate tends to be lower because almost everybody born will make it past the age of 5, whereas in nations with a higher mortality rate, like the the Mid-East and Africa.
Your description sounds like human choice, rather than “genetic push.”
I recently discovered that termites have been eating my house. Does that purported correlation apply to termites?
Cordially,