Cynthia discusses her experience with pregnancy and gender dysphoria after having mostly resolved it with therapy.

After growing up with gender dysphoria, Cynthia tells the story of her search for alternative therapies without transition.

A list of definition cards for various terms in the biology of sex.

Many often conflate two concepts in biology: how sex is defined versus how sex is determined. Here’s why the difference is important.

Cynthia Breheny (@PTElephant) and I (@zaelefty) present the Self Cloud for kids, a return to simple yet profound truths about the self in three categories: Expression, Sex, and Interests.

A series of flow charts showing the steps of sex development for typical males and females and a variety of DSDs.

Activists continue to conflate karyotype (one’s collection of chromosomes) with sex (one’s reproductive role). Here’s why they are not the same.

What are ‘sexes’? And what are male and female? In this post, we’ll explore what sexes ultimately are and how they are universally defined across species.

Because male and female are fundamentally defined by the gametes they produce, understanding the origins of the two sexes means understanding why gametes come in two different sizes.

The Scientific American article ‘Stop Using Phony Science to Justify Transphobia‘ is another article using the complexities of sex determination and the diversity of sex differences to argue that sex is not binary.

ScienceVet’s thread on the sex spectrum is one of the most shared pieces on the subject. Let’s break it down and analyze the details of his argument with peer-reviewed science.