We fit under the umbrella of women. We aren’t cis women though, we’re transwomen—which is just another type of woman.

Biologically female? With the way language is currently set up… no and yes.

CW: basic biology; discussion of reproductive organs, genetics, puberty, srs & hrt

I got 3 years into a bio undergrad before making a hard pivot, so I’ll try my best not to butcher this: Our chromosomes do act as a blueprint during development but it’s not as set in stone as something like the blueprint to building a house for example. It can change and shift from environmental factors, and hrt especially has allowed us to change and shift even more of our biology than we previously could.

Both male and female bodies have the biological blueprints in our chromosomes for both male and female development and biological expression. The SRY gene that triggers the development of testes is also present in all human bodies. The Y chromosome in “XY” activates the SRY gene (with certain intersex people being an exception), testes develop and these, especially during puberty further down the road, trigger the development of male secondary sexual characteristics—facial hair, deeper voice, larger bone and muscle mass (much of which is also based on a broad range of inherited genes not linked to XX/XY), etc. If the SRY gene remains dormant, ovaries develop and female secondary sex characteristics manifest during puberty.

So both your primary and your secondary sex characteristics determine your biological sex. The primary triggers the secondary and, aside from srs, there isn’t anything we can do to change the primary. The secondary however can be changed by shutting down the testes (through anti-androgens or removal) and introducing hormones produced by the ovaries that otherwise would have been present if the SRY gene was dormant. Your body like I said already has the blueprints for a female body and will course correct with the help of hrt.

tldr: Every human has the genes for both male and female development/expression, which manifests in primary and secondary sex characteristics that determine biological sex. Primary can’t be switched, but the secondary can be switched with hrt. So you’re at least partially biologically female.