Do you know of a study that confirms that in vitro does not produce Gays?
If so, it would confirm that nature is causing it and not nurture.
No I am not aware of any such study, and I never claimed that in vitro does not produce Gays. I only claimed that in vitro fertilization does not qualify as “chemical activity in the womb” because in vitro fertilization takes place in a test tube—not a womb.
What I was picking at was the phrase “chemical activity in the womb” because it suggests chemical activity produced by the womb, when in fact some of these chemicals are produced in the testes of the male.
The complete story of the formation of a sexual mammal begins in the testes where a sperm supplying a Y chromosome bearing gene SRY is produced, then is transprted to either a womb or test tube where it meets an egg, becomes an embryro with female parts, and if in a test tube, then gets transplanted into a womb, then in the womb grows male parts, and brain development begins, then after birth development continues, on into adolescence and puberty.
Isn’t there a study somewhere showing that autopsies of the brains of gay men show differences from those of heterosexual men? That suggests nature, but not all of nature takes place in the womb.