The participation of transgender people in competitive sports, a traditionally sex-segregated institution, is a controversial issue, particularly the inclusion of transgender women and girls in women's sports.

Opponents argue that transgender women have an unfair advantage over, and may endanger, cisgender women in competitive sports due to sex differences in human physiology, and that these differences are not sufficiently reversed by transgender hormone therapies. Supporters of transgender athletes argue that medically prescribed puberty blockers and estrogen suppress testosterone levels and reduce the muscle mass of transgender women, reducing possible competitive advantages. Supporters also argue that sport, particularly youth sports, is also about belonging, well-being, and socialization of young people. The American Medical Association states that legislation barring trans women from women's sports harms the mental health of transgender people.

The controversy has caused debates regarding sex verification in sports. Since the mid-twentieth century, sports institutions have responded to the participation of transgender women and women suspected to be transgender, male, or intersex by adding eligibility requirements to women's sports variously determined by physical examination, sex chromosomes, and sex hormones. Proponents of such regulations regard them as necessary to ensure fair competition and women's safety. Opponents have criticized such regulations as unfounded, degrading, misogynistic, discriminatory against transgender and intersex women, disproportionately affecting women of color, and violating medical ethics and human rights.^{[excessive citations]}

Satsuki Nakayama (中山 咲月, Nakayama Satsuki, born September 17, 1998) is a Japanese model and actor, known for his portrayal as Naki in Kamen Rider Zero-One and Shima Nishina in Kiss Him, Not Me. He started his modeling career as an exclusive model for the magazine Pichi Lemon and later became one of the standout models of Japan's genderless fashion subculture.

Nakayama initially came out as non-binary in 2019, but he later came out as a transgender man in 2021.

• ... that Argentine trans woman Mariela Muñoz raised 23 children and worked as a tarot reader to support them?
• ... that Lucy Salani is considered the only known Italian transgender person to survive the Nazi concentration camps?
• ... that Anjali Lama, Nepal's first transgender model, worked with Calvin Klein in 2019?
• ... that the British musician Charlie Deakin Davies cofounded the Trans Creative Collective, a directory of transgender musicians?
• ... that, after being elected as the first transgender city councilor of Belo Horizonte, Duda Salabert was fired from her job as a teacher when the school where she worked received a threatening email?
• ... that París Galán, who introduced a style of drag performance in Bolivia, became the first-ever transgender individual to win elective office in the country?

• 7 – Karin Dreijer (1975), Swedish gender fluid singer-songwriter and record producer
• 8 – Roberta Cowell (1918), British trans woman racing driver and fighter pilot
• 13 – Carmen Carrera (1985), American television personality, actress and model
• 18 – Audrey Tang (1981), Taiwanese programmer and government minister
• 20 – Gigi Gorgeous (1992), Canadian actress, YouTuber, model
• 23 – Geraldine Roman (1967), Filipino journalist and politician
• 28 – Leiomy Maldonado (1987), American dancer, instructor and model
• 29 – April Ashley (1935), British model

• ... that the 2015 State of the Union Address was the first State of the Union Address in which the President of the United States used the words "gay", "lesbian", and "transgender"?
• ... that Nicole Maines won a Maine Supreme Court ruling that denying transgender students access to the bathroom consistent with their gender was unlawful, and went on to become the superheroine Dreamer in the television series Supergirl?
• ... that in 1776, a person reported being genderless, changed names to the Public Universal Friend, dressed androgynously, asked not to be referred to with gendered pronouns, and has been called a chapter in transgender history "before 'transgender'"?

They can try to ban us. They can try to get rid of our health care. They can try to deny us housing, credit, and public accommodations. They can try to shame us. They can try all they want to erase us, but at some point, they will realize the trans community is never going away. Trans people are everywhere. Every country, every race, every ethnicity, every religion, every socioeconomic level, every period of human history — we are everywhere. We are natural. You can’t rid of what’s natural. I think they know that, and it terrifies them.