LOL! Dude! When you are wrong - YOU ARE WRONG! LOL!
“Animal models have indicated that androgenic steroids acting before birth might influence the sexual orientation of adult humans. Here we examine the androgen-sensitive pattern of finger lengths1, and find evidence that homosexual women are exposed to more prenatal androgen than heterosexual women are; also, men with more than one older brother, who are more likely than first-born males to be homosexual in adulthood, are exposed to more prenatal androgen than eldest sons. Prenatal androgens may therefore influence adult human sexual orientation in both sexes, and a mother's body appears to 'remember' previously carried sons, altering the fetal development of subsequent sons and increasing the likelihood of homosexuality in adulthood.”
http://www.unl.edu/rhames/courses/readings/homofinger/homo_finger.html
PET and MRI show differences in cerebral asymmetry and functional connectivity between homo- and heterosexual subjects
“The present study shows sex-atypical cerebral asymmetry and functional connections in homosexual subjects.”
PET and MRI show differences in cerebral asymmetry and functional connectivity between homo- and heterosexual subjects
Brain response to putative pheromones in homosexual men.
“These findings show that our brain reacts differently to the two putative pheromones compared with common odors, and suggest a link between sexual orientation and hypothalamic neuronal processes.”
Brain response to putative pheromon... [Proc Natl Acad Sci U S A. 2005] - PubMed - NCBI
Biological and psychosocial determinants of male and female human sexual orientation.
Biological and psychosocial determinants of mal... [J Biosoc Sci. 2005] - PubMed - NCBI
Male sexuality may be decided in the womb
Male sexuality may be decided in the womb - life - 26 June 2006 - New Scientist
Studies of the causes of homosexual orientation
Essay 1: What causes sexual orientation?
"So, what's the common factor? If the study's design rules out learned influences, and if the results in women rule out genetics, that leaves what the authors call "hormonal influences" or noncognitive differences in the infant environment. According to the Guardian, the same research team has "begun another study to investigate brain symmetry in newborn babies, to see if it can be used to predict their future sexual orientation." If it can, that will scratch postnatal factors off the list, and the search will narrow to hormones in the womb. Already, the authors point to evidence that homosexuality may be caused by "under-exposure to prenatal androgens" in males and "over-exposure" in females."
To find out, they have begun another study to investigate brain symmetry in newborn babies, to see if it can be used to predict their future sexual orientation.
Savic and Lindström Stockholm Brain Institute
PET and MRI show differences in cerebral asymmetry and functional connectivity between homo- and heterosexual subjects. full?sid=2a1340f1-a699-4a8d-b31b-ce7efda d0db1
Bellarmine University
Maternal and placental hormones may also influence prenatal human sexual differentiation of the GnRH neuronal and other neuronal systems; for example, maternal diethylstilbestrol seems to affect the fetus, as witnessed by later behavior (Meyer¬Bahlburg, et al. 1985) and sexual orientation (Meyer¬Bahlburg, et al. 1995). [para 23]
"Vomeronasal afferents project to the mitral cells of the accessory olfactory bulb (AOB), which in turn make dendro-dendritic contacts with granule cells within the AOB and project to the anterior as well as the posterior portions of the medial amygdaloid nucleus. The anterior medial amygdala is reciprocally innervated with the posterior medial amygdala, where many neurons also contain estradiol and androgen receptors. Neurons of the anterior medial amygdala project via the ventral amygdalofugal pathway to the intermediate portion of the posterior bed nucleus of the stria terminalis (BNST) and to the lateral subdivision of the medial preoptic area (POA). Neurons of the posterior medial amygdala project via the stria terminalis to the medial subdivisions of the posterior BNST and medial POA, respectively." (p. 1063). <b>Any or all of these sites may be affected by genetic and hormonal factors that influence both the development of the GnRH neuronal system and of sexually dimorphic olfactory systems. Furthermore, Segovia and Guillamon (1993) have linked many of these sites to sexually dimorphic reproductive behaviors.</b> [para 24]
I have a lot more if you would like me to post it.
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