Runthia

Streameuse, créatrice de contenu sur WoW, carpette professionnelle et humoriste en devenir (non).

[Daniel Lismore @daniellismore]

Why People Are Trans, What Biology Actually Says

Everyone begins the same way.

In the very first weeks after conception, there is no male or female body. Every human embryo follows the same early plan. At about five weeks of development the fetus still has the same set of tissues, the genital ridge and two duct systems that could become male or female organs. Even the nipples form before hormones that create sexual difference appear. That is why everyone has them.

Between weeks six and twelve, genes and hormones begin steering development. A gene on the Y chromosome called SRY can switch on production of testosterone in the testes. If it activates and the fetus’ cells respond strongly, male anatomy begins to form. If it does not, female anatomy develops by default. But this process is never all-or-nothing. Timing, hormone levels, receptor sensitivity, and countless small genetic variations can change how the body or brain develops.

Those variations are natural. They produce what biologists call sexual differentiation, not a simple binary. Intersex people, around 1.3 million in the UK alone, are living proof that human sex traits can overlap or differ from textbook categories. Some have XY chromosomes but develop ovaries; others have XX chromosomes but higher testosterone; some have combinations that don’t fit either. This is ordinary human biology.

Brain development follows a similar path. During pregnancy, the brain is shaped by the same hormones that guide the body, but in some people the two do not match perfectly. Decades of neuroscience show subtle structural and functional differences between typical male and female brains. Research published in Nature Reviews Neuroscience (2019, 20:725–735) found that in transgender women, several brain regions more closely resemble female patterns than male ones. That means their sense of identity is rooted in biology, not imagination.

So being trans is not a trend, a phase, or a social contagion. It is a natural expression of the way human development works.

Across cultures and history, societies have recognised more than two genders, from hijra in South Asia to Two-Spirit people in Indigenous America to fa’afafine in Samoa. What modern science adds is an understanding of how this diversity arises: through ordinary variation in genes, hormones, and brain organisation.

Large-scale studies confirm that gender-affirming treatment can ease suffering. Access to puberty blockers, hormone therapy, or supportive healthcare is linked with dramatic reductions in depression and suicidal thoughts. The Trevor Project’s 2023 report found trans youth with access to gender-affirming care were 73 percent less likely to attempt suicide. The Endocrine Society and the World Health Organization both recognise this care as medically necessary.

Yet misinformation keeps spreading, claims that biology is simple, that sex can be determined only by chromosomes, that people can be “made trans” by culture. Real biology says otherwise. Even chromosomes are not absolute: some women have XY; some men have XXY; others have mosaic patterns of both. What matters for lived reality is how bodies and brains develop, not a single letter on a lab report.

If you have ever wondered why trans people exist, the answer is right there in nature. Every embryo starts the same. Hormones and genes push development in different directions. Sometimes the brain and the body don’t line up perfectly, and that is part of what makes humanity so varied and complex.

Trans people are not against nature, they are nature. They exist because of biology.

[Runthia @Runthia_]

@KAO_svmd Ouiiiii merciiiiii 🥰 Je suis trop heureuse, je vais pouvoir reprendre les streams en beauté grâce à toi 🎉🎉

[Runthia @Runthia_]

@KAO_svmd Ho ouiii merciiiii 🤩
J'ai pas les mots pour exprimer ma reconnaissance, je suis si heureuse !! Je vais pouvoir faire ma mézon moi aussi 🎉

[Runthia @Runthia_]

@treckiewow I'd say Lorna Crowley with my Gilnean house ✨

[Runthia @Runthia_]

@ImmonatePOV Alliance 🦁

[BlizzSpirit @BlizzSpirit]

🎁 CONCOURS 🎁
À l'occasion de la sortie de l'accès anticipé du logis, le 3 décembre 2025, un code de jeu pour l'édition Epic de Midnight est en jeu avec plusieurs bonus comme l'accès anticipé.
Participer :
💙 Suivre @BlizzSpirit
🔁 RT ce post

🎲 T.A.S. : 09/12/25
#WoW_Partner

[Kao 🌷 @KAO_svmd]

🌜 #Giveaway de Midnight, epic edition grâce à @Warcraft_FR : sésame, montures, mogs et mobilier pour le housing, profite de l'early access pour custom ta MÉZON 🫵 #Wow_partner #worldofwarcraft
Pour participer :
♥ @KAO_svmd
🔁 RT ce post
TAS le 8/12 !

[Runthia @Runthia_]

@TromaFR @Warcraft_FR Une maison humaine multi thématique, avec une partie standard, une partie tour des mages, et une crypte cachée de serial killer style gilnéen 😎

[Runthia @Runthia_]

@Maystine_ Même si parfois je change un peu je reviens toujours sur ma bonne vieille war 😎

[Dan @Method_Danwarr]

Early Access Housing is live, so I'm giving you a chance to become a WoW homeowner early with a Midnight Epic Edition code! To enter:
✅ Follow
🔁 Retweet
💚 Like
Winner will be drawn Dec 9th! Best of luck!
#WoW_Partner

[Cruella @cruelladk]

🎁 GIVEAWAY 🎁

Pour fêter la sortie du Housing, et y avoir accès, je vous fait gagner une Epic Edition de Midnight de plus !

Pour participer :

❤️ follow @cruelladk
🔁 RT ce post

📅 TAS le 09/12

Bonne chance à tous 🍀
#WoW_Partner

[Melody @karine_melody]

🎁 Giveaway 🎁

À l’occasion de l’arrivée de l’accès anticipé du Housing, et en partenariat avec @Warcraft_FR , je vous propose de remporter 1 Epic Edition de #Midnight !

Modalités :

➡️ suivre @karine_melody
➡️ RT ce post
🗓 Tirage au sort le 09/12/25

#WoW_Partner

[Runthia @Runthia_]

@MrGMYT First thing I will do : trying to not get lost in all the items available 😂

[Runthia @Runthia_]

@Sam_Vostok @Warcraft_FR #SamWarcraft Dans le quartier de l'Alliance bien sûr 🦁

[Sam Vostok @Sam_Vostok]

Pour fêter 🥳l'arrivée de l'accès anticipé du Housing dès aujourd'hui, je vous propose un concours pour gagner 1 édition épique de #Midnight grâce à @Warcraft_FR qui permet de découvrir cette nouveauté de l'extension en avance 😊🎁
🔹Follow @Sam_Vostok
🔹RT ce post et répondre avec #SamWarcraft en indiquant dans laquelle des deux zones vous construirez votre Logis
🔹TAS 09/12
#WoW_Partner

[Runthia @Runthia_]

@sharmsong Kinda hard question... I would say Anduin or Alexstrasza 😄

[Runthia @Runthia_]

@WarcraftSecrets The Housing 🤩

[BlizzSpirit @BlizzSpirit]

🎁 CONCOURS 🎁
À l'occasion de la sortie de la bêta de #Midnight, le 11 novembre 2025, un code de jeu pour l'édition Epic de Midnight est en jeu avec plusieurs bonus comme l'accès à la bêta.

Participer :
💙 Follow : @BlizzSpirit
🔁 RT ce post

🎲 T.A.S. : 17/11/25
#WoW_Partner

[Evanessor @evanessor]

🎁Giveaway🎁

Je vous fais gagner une Édition Épique de Midnight !
L'Édition Épique vous donnera accès à la Bêta de Midnight qui commence aujourd'hui !
Pour participer :
▶️Follow @Evanessor
🔄RT ce tweet
Tirage au sort le 19/11 #WoW_Partner #Midnight

[Runthia @Runthia_]

@TromaFR @Warcraft_FR Je suis pas très originale... Mais le housing 🤩