Tuesday, June 15, 2021

Neurobiology of gender identity and sexual orientation

Sexual identity and sexual orientation are independent components of a person’s sexual identity. These dimensions are most often in harmony with each other and with an individual’s genital sex, although not always. The present review discusses the relationship of sexual identity and sexual orientation to prenatal factors that act to shape the development of the brain and the expression of sexual behaviours in animals and humans. One major influence discussed relates to organisational effects that the early hormone environment exerts on both gender identity and sexual orientation. Evidence that gender identity and sexual orientation are masculinised by prenatal exposure to testosterone and feminised in it absence is drawn from basic research in animals, correlations of biometric indices of androgen exposure and studies of clinical conditions associated with disorders in sexual development. There are, however, important exceptions to this theory that have yet to be resolved. Family and twin studies indicate that genes play a role, although no specific candidate genes have been identified. Evidence that relates to the number of older brothers implicates maternal immune responses as a contributing factor for male sexual orientation. It remains speculative how these influences might relate to each other and interact with postnatal socialisation. Nonetheless, despite the many challenges to research in this area, existing empirical evidence makes it clear that there is a significant biological contribution to the development of an individual’s sexual identity and sexual orientation.




Wednesday, March 7, 2018

Podcast: SOGI123 vs Barry Neufeld, a discussion on Transgender

On February 25th 2018, Dr. Darrel Ray and I participated in a podcast with the folks at Left at the Valley in British Columbia Canada about resistance to a school program to educate students on sexual orientation and gender identity (SOGI123). The discussion with Dr. Ray and myself begins at around 26 minutes.

Kevin Francis of Left at the Valley says:
“So it has finally come to this, the crew responds to school trustee Barry Neufeld after his attack on a tolerance program called SOGI123 taught to school kids. Neufeld feels as a christian that this program designed to foster tolerance of those of a different orientation or identity is paramount to child abuse!
Is he correct?
We invite psychologist Dr Darrel Ray and biologist Dr Veronica Drantz to give us the hard science on the subject.”

Monday, August 28, 2017

Assigning Gender with Dr. Drantz - Podcast

Everyone should be allowed to be who they are!

My presentation begins at 32 minutes and runs until 1:09.

Saturday, April 9, 2016

Your Sexual Brain (podcast with Dr. Darrel Ray)

In this podcast I talk with Dr. Darrel Ray about why brains do not fit into a "gender binary."

Monday, April 6, 2015

The Gender Binary & LGBTI People: Religious Myth and Medical Malpractice (PowerPoint slides)

Designated as disordered rather than just different, LGBTI people have been and continue to be victims of medical malpractice purely because they are neither Adams nor Eves. Psychiatrists, surgeons, endocrinologists, pediatricians, and other medical experts have subjected LGBTI people to bogus and horrific treatments with reckless disregard for patient health and well-being―all the while ignoring the basic tenets of medical ethics and the ever-growing scientific evidence showing LGBTI people to be natural variations. Beyond this, medical stigmatization of LGBTI people has contributed to their oppression in the world at large. This treatise will contrast the scientific evidence with the ongoing medical (mis)treatment of LGBTI people to vividly illustrate the insidious effect of the biblical creation myth.
Here are the PowerPoint slides on this topic for my upcoming April 9th presentation at Northern Illinois University.