and the citations are?
Rats are not humans.
The human brain develops outside the womb after birth so mere physical development inside the womb is not enough.
Sorry but I have yet to see ANY credible developmental evidence as you cite.
One more research paper, published in Nature in 1995, deals with the brains of transgendered individuals. The researchers dissected the brains of a number of deceased transgendered persons, MTF and FTM, as well as the brains of some gay and lesbian indivuals and heterosexual men and women.
1. The BSTC region for heterosexual women was distinctly different from heterosexual men, being smaller with a high statistical significance.
2. The BSTC region in MTF transgendered individuals was in the normal range for women. The BSTC was actually smaller than heterosexual women, but not significantly so.
3. The BSTC region on lesbians and FTM transgendered individuals was closer to that of heterosexual men.
4. The BSTC region for homosexual males was slightly larger than that of heterosexual males, but not significantly so. However, there may be a saturation effect involved, that the BSTC development rapidly maxes out beyond the heterosexual male range.
One of the conclusions is, prenatal condictions most probably sets the stage for the direction of the future development of the brain and human sexuality.
As always, more research needs to be done.