Overview

The United States has no single law on whether "sex" means biological sex or gender identity. The answer depends on which federal statute is involved, which president is in office and which state a person lives in or was born in. Between 2020 and 2026 the country moved in two directions at once. In 2020 the Supreme Court read "sex" in employment law to cover gender identity. From 2025 the federal executive defined sex as biological and fixed, and a series of Supreme Court rulings upheld state laws built on that definition.

This page covers federal law, state law, the small group of laws written specifically for detransitioners, and what all of this means in practice for people who have stopped or reversed a transition. It goes deeper on the US than the global overview at sex and gender identity law around the world. The concepts behind these disputes are on sex vs gender identity in law.

Key terms

• Gender marker: the sex field ("M", "F" or, in some states, "X") on a passport, driver's licence, birth certificate or Social Security record.
• Sex-definition law (often called a "Women's Bill of Rights"): a state law that defines "sex", "male" and "female" by reproductive biology at birth for all state law.
• Youth medical ban: a state law barring puberty blockers, cross-sex hormones and surgery for gender transition in minors.
• Statute of limitations / repose: the deadline for filing a lawsuit. A statute of repose is an absolute cutoff that runs regardless of when the injury is discovered.
• Detransition coverage mandate: a law requiring insurers that pay for transition to pay for reversal or complications on the same terms.

Timeline

Federal law

Bostock and employment

In Bostock v. Clayton County (2020) the Supreme Court held that Title VII of the Civil Rights Act 1964 bars employers from firing someone for being gay or transgender, because doing so necessarily involves treating them differently by sex (Littler). The Court decided only that question. It did not address bathrooms, dress codes or pronouns (Out & Equal, advocacy).

Bostock still stands, but its reach has been narrowed. In May 2025 a federal court in Texas vacated the parts of the Equal Employment Opportunity Commission's 2024 harassment guidance that covered bathrooms, dress and pronouns, holding the agency had exceeded its authority (Ogletree). On 22 January 2026 the EEOC rescinded the whole guidance by a 2–1 vote (CUPA-HR). Firing someone for being transgender remains unlawful under Title VII.

Executive Order 14168: sex on federal records

On 20 January 2025 Executive Order 14168 declared it federal policy "to recognize two sexes, male and female", defined by the reproductive cell a person belongs to "at conception", and stated that gender identity "does not provide a meaningful basis for identification". It directed that passports, visas and Global Entry cards "accurately reflect the holder's sex" (Executive Order 14168; Orr v. Trump, D. Mass.). The State Department stopped issuing "X" markers and stopped changing passport sex away from birth sex. Social Security stopped processing any change to the sex field from 31 January 2025 (Law Dork).

The passport policy was challenged in Orr v. Trump. A Massachusetts court blocked it for a nationwide class in June 2025. On 6 November 2025 the Supreme Court stayed that injunction, reasoning that showing sex at birth is like showing country of birth: the government "is merely attesting to a historical fact" (US Supreme Court). On 5 June 2026 the First Circuit dismissed the government's appeal as moot and vacated the preliminary injunctions (CourtListener; FindLaw). The underlying case was listed as ongoing in October 2026 (ACLU, advocacy). Existing passports remain valid until they expire; new and renewed passports show sex at birth (Lambda Legal, advocacy).

Title IX, schools and sport

Title IX bans sex discrimination in federally funded education. The Biden administration's 2024 rule extended it to gender identity. On 9 January 2025 a federal court in Kentucky vacated the entire rule nationwide in Tennessee v. Cardona, holding that sex discrimination in Title IX "means discrimination on the basis of being a male or female". The Department of Education returned to the 2020 rule, which has no gender-identity provisions (McGuireWoods). Executive Order 14201 (5 February 2025) then directed Title IX enforcement against schools that let males compete in girls' and women's sport (Congressional Research Service).

On 30 June 2026 the Supreme Court upheld Idaho's and West Virginia's sports laws in West Virginia v. B.P.J. and Little v. Hecox. All nine justices agreed Title IX allows teams defined by biological sex; the Court split 6–3 on equal protection (Foley Hoag; USA Today). The ruling permits such laws but does not require them in states that allow participation by gender identity.

Skrmetti and youth medical transition

In United States v. Skrmetti (18 June 2025) the Supreme Court held 6–3 that Tennessee's ban on puberty blockers and hormones for minors with gender dysphoria "is not subject to heightened scrutiny under the Equal Protection Clause" and passes rational-basis review (the most lenient test, asking only whether a law is reasonably related to a legitimate aim) (US Supreme Court). Chief Justice Roberts reasoned that the law classifies by age and medical use, not by sex or transgender status, and that states have wide discretion where there is medical and scientific uncertainty (Federalist Society; Michigan Law). Critics, including the dissent and groups such as the NEA, argue that the law plainly turns on sex and that the Court sidestepped evidence of benefit (NEA, advocacy).

HHS, CMS and the FTC

The executive branch has since used health-funding and consumer-protection powers:

• HHS review: on 1 May 2025 HHS published Treatment for Pediatric Gender Dysphoria: Review of Evidence and Best Practices. A final peer-reviewed version followed on 19 November 2025, with nine external reviews, including one from the American Psychiatric Association (HHS; SEGM). HHS says the report shows the harms of youth transition are "significant, long term, and too often ignored" (HHS press release). For how it compares with the Cass Review and other systematic reviews, see evidence reviews.
• Kennedy declaration: on 18 December 2025 Health and Human Services Secretary Robert F. Kennedy Jr. declared these treatments for minors below professional standards, threatening providers with exclusion from Medicare and Medicaid. A federal court in Oregon vacated it on 18 April 2026 for exceeding HHS's authority (Health Affairs; Potomac Law).
• CMS rules: CMS proposed two rules the same day. The Medicaid/CHIP rule, published on 13 August 2026 and in force from 13 October 2026, ends federal funding for puberty blockers, cross-sex hormones and surgery for gender transition under 18 (under 19 in CHIP). It allows a six-month taper for existing hormone patients and keeps coverage for disorders of sex development and complications. States may still pay with their own money (Crowell; AJMC). Whether the second rule, barring Medicare-certified hospitals from these procedures on children, has been finalised was not confirmed (Federal Register).
• FTC: the Federal Trade Commission held a workshop on 9 July 2025, with detransitioners and parents among the speakers, then asked the public for evidence of "false or unsupported claims" (FTC). In January 2026 it issued civil investigative demands to the Endocrine Society and WPATH about their guidelines (California AG). The American Academy of Pediatrics (AAP), the Endocrine Society and WPATH sued, arguing the demands punish protected speech (US News). A federal court blocked the demand to the Endocrine Society (Endocrinology Advisor). No FTC enforcement action against a clinic or association was confirmed as of October 2026.

Supporters see these steps as overdue scrutiny of a weak evidence base. Opponents, including the 22 states that sued over the Kennedy declaration, see an attempt to end lawful care through funding threats, and have pointed out that some hospitals in states without bans have stopped treating minors (NPR).

Talk therapy: Chiles v. Salazar

In Chiles v. Salazar (31 March 2026) the Supreme Court ruled 8–1 that Colorado's ban on "conversion therapy" for minors, as applied to a counsellor's talk therapy, regulates speech by viewpoint. It sent the case back for review under strict scrutiny (Free Speech Center; APA). The ruling did not endorse any therapy. It does mean that state laws cannot simply forbid talk therapy that questions a young person's gender identity while permitting therapy that affirms it. This matters for therapists offering gender exploratory therapy, which critics of such laws said had been chilled.

State law

Youth medical bans

As of 29 September 2026, 27 states had enacted laws or policies limiting minors' access to medical transition. Twenty-five were in force; Arkansas's and Montana's were blocked by courts (KFF). Six states impose criminal penalties on providers (FindLaw). Many bans also give people treated as minors long periods to sue, such as Tennessee's SB1, which allows lawsuits for 30 years (USA Today). The laws vary in exemptions for disorders of sex development (see intersex and DSDs) and in whether patients already on treatment may continue.

Sex-definition laws

Kansas was first, in 2023, defining a person's sex as "biological sex, either male or female, at birth" by reference to a reproductive system "developed to produce ova" or "to fertilize the ova of a female" (Poynter). Iowa (SF 418, from 1 July 2025) removed gender identity from its civil rights act and ended birth-certificate sex changes (Jackson Lewis). Utah, West Virginia and Wyoming followed in 2025, each also restricting school facilities by sex (Ogletree), then Texas (HB 229) and North Carolina (HB 805). The Center Square counted North Carolina as the 18th state with such a definition (Center Square). An exact count as of October 2026 was not confirmed.

Documents and birth certificates

State rules on changing sex on birth certificates and driver's licences range from self-attestation with an "X" option to no change at all. The Movement Advancement Project (advocacy) counts eight states that do not allow the marker on a driver's licence to be updated (MAP). Texas stopped accepting court orders for driver's licence changes in August 2024, and its attorney general's March 2025 opinion said courts cannot order agencies to change sex on licences or birth certificates. A birth certificate can still be corrected for "proven incompletion or inaccuracy" (TexasLawHelp).

Kansas went furthest. SB 244, passed over Governor Kelly's veto and in force from 26 February 2026, invalidated driver's licences and birth certificates whose sex marker differed from birth sex, and required holders to surrender them (Topeka Capital-Journal). A Douglas County judge refused to block the law in February and March 2026, though in August he temporarily reinstated one woman's licence on due-process grounds (Lawrence Times). An evidentiary hearing on a temporary injunction began on 29 September 2026; the outcome was not confirmed (Lawrence Journal-World; ACLU of Kansas, advocacy).

Bathrooms, sport and schools

• Bathrooms: about 21 states limit bathroom use by sex in at least some public buildings, with criminal penalties in a few, such as Florida (The Advocate, citing MAP). Texas's SB 8 (the "Texas Women's Privacy Act") applies to government buildings, schools and universities from 4 December 2025, with fines on institutions of up to $125,000 (Texas Tribune). Kansas SB 244 lets people sue over violations in government buildings (ACLU of Kansas, advocacy).
• Sport: 27 states bar males from girls' and women's school sports (USA Today).
• Parental notification: several states require schools to tell parents when a child asks to be treated as the other sex at school; Idaho was the latest in 2026 (MultiState). On 2 March 2026 the Supreme Court, 6–3, restored an injunction against California's policy of keeping a child's social transition from parents in Mirabelli v. Bonta (Justia). The arguments are covered on social transition at school.

State comparison

Sources for each row are given in the sections above and below. The Montana sex-definition note is from MAP (MAP, advocacy).

Laws written for detransitioners

Longer deadlines to sue

Ordinary malpractice deadlines in the US typically range from one to three years (Washington Examiner). That is a problem because detransition often comes years after treatment. Littman's survey of 100 detransitioners found an average of 3.9 years between starting and stopping transition (Littman 2021). Among r/detrans stories analysed by detrans.ai with both dates recorded, the median gap was 4 years and about 11% detransitioned 10 or more years later (n = 997; self-selected sample, AI-extracted timelines) (detrans.ai stats).

• North Carolina HB 805 (2025): gives anyone injured by gender transition treatment, at any age, 10 years from discovering the injury and its cause, and says it revives claims already time-barred (NC General Assembly). It is separate from HB 808 (2023), the minors' ban, which gives people treated as minors until 25 years after turning 18 (UNC School of Government). Prisha Mosley moved to revive her dismissed malpractice claim under HB 805, but the trial judge declined to apply the revival. The Court of Appeals heard her appeal on 29 September 2026 and had not ruled (WRAL; see Prisha Mosley).
• Montana HB 682 (2025): claims for treatment received as a minor may be brought within 25 years of turning 18, or 4 years from discovering the injury and its cause, whichever is later (translegislation.com, advocacy tracker quoting the bill). A provision making it retroactive was removed by amendment (Citizen Portal).
• Tennessee and Arkansas: Tennessee's 2023 ban allows suits for 30 years; Arkansas's 2023 Protecting Minors from Medical Malpractice Act created a 15-year window (Arkansas Advocate).

Courts have also moved. In January 2026 a New York jury returned the first known verdict for a detransitioner, $2 million to Fox Varian, and in June 2026 the Texas Supreme Court revived Soren Aldaco's claims that lower courts had held were filed too late. Other cases are tracked on detransition lawsuits.

Supporters say these laws simply match deadlines to how long it takes to recognise harm. Critics, including the North Carolina governor who vetoed HB 805, say they are designed to make clinicians stop treating transgender patients for fear of liability (WUNC). Whether a legislature can revive claims already barred by a statute of repose is the open question in Mosley.

Insurance coverage for detransition

• Texas SB 1257 (in force 1 September 2025): health plans that cover transition procedures must also cover adverse effects and reversals, including annual screening (LegiScan; Texas Scorecard, partisan outlet). Equality Texas (advocacy) argues insurers will respond by dropping transition coverage altogether (Equality Texas).
• Montana Code 33-22-149 (in force 1 October 2026): a policy covering gender transition treatment "must also include coverage for detransition treatment under equivalent cost-sharing policies", and if it stops covering transition it must still cover detransition for people enrolled while transition coverage existed (Montana Code). HB 682 also added detransition treatment to Medicaid and Healthy Montana Kids in some situations (BillTrack50).
• Tennessee HB 754 (signed 7 May 2026): insurers covering transition must cover "the same services when provided for the purpose of detransition". The law also requires state-funded facilities that treat minors to offer detransition care and to report data on transition care for minors to the Department of Health, which critics call a registry (Lawyers for Good Government, advocacy; LGBTQ Nation, advocacy; Tennessean).
• Federal: the TRUTH in Coverage Act, introduced in Congress in 2026, would extend the same idea nationally; it had not passed as of October 2026 (The Federalist, partisan outlet).

Separately, the federal Women's Health and Cancer Rights Act requires group plans that cover a mastectomy to cover breast reconstruction (US Department of Labor). Some detransitioners report that it helped them get reconstruction covered; whether it applies to every transition-related mastectomy has not been confirmed by a court or regulator.

What it means for detransitioners

Changing documents back

The legal picture for reversing a sex marker is uneven:

• Passports: the 2025 policy issues passports in birth sex, so restoring it is a routine application.
• Social Security: the agency stopped processing changes to the sex field in January 2025 (Law Dork). Whether it now corrects records back to birth sex could not be confirmed.
• Restrictive states (Kansas, Texas, Iowa and others): these laws were written to stop transition, but in effect they treat birth sex as the only valid entry. In Kansas, changed documents were invalidated by law. In Texas, a birth certificate can be corrected for inaccuracy.
• Permissive states: some allow self-attestation, which makes reversal easy. Others allow only one change without a court order or require a clinician's letter. These rules were written with transition in mind and can fit a return to birth sex poorly.

Detransitioners describe both ends. Some describe a harder route back than out:

In order to resume my original sex on my birth certificate, I have to get a "court order"... Meaning an attorney and likely a legal case of some kind. … It's significantly easier to change a birth certificate to the opposite sex than it is to resume the original sex, in my state. You can change it with just a written request from the applicant. —patrello, detrans female

The rule is that you can only change it one time without the involvement of a therapist. I'm realizing now how fucked up it is that I didn't need a therapist help to transition but I am required to get their help to detransition. —RowanFinley512, detrans male

Others found the new restrictive rules made reversal simple:

I reverted the gender marker on my Texas ID with the DPS a week ago. I was worried about this since there's been conflicting information regarding texas ID gender marker changes now. Thankfully they had my original birth certificate (since I changed that too) on file before I changed it the first time so it was pretty easy. —Aware-Resist-8655, detrans male

Federal records are not always fixed in step with state ones:

It was extremely easy to change my sex marker the first time as a literal child, but to change it back I had to go through a months long process. And federal gov won't fix my federal sex marker. —BluejaySafe4950, detrans female

Front-desk staff can also apply transition-era assumptions:

The worker took it upon herself to assess my gender and decided that I must have really been born male and was an MTF rather than an actual female. —L82Desist, detrans female

Practical steps for names, records and coming out are on social and practical detransition.

Paying for care

Outside Texas, Montana and Tennessee, no law guarantees that an insurer that paid for transition will pay for reversal. Commenters on r/detrans describe the asymmetry:

It does sting that BCBS is willing to pay 10k to chop my tits off but not the same to put them back on. —xnyvbb

The same commenter later reported that reconstruction was covered. Others describe getting coverage by having the surgery coded as ordinary reconstruction. In a survey of 237 detransitioners, many reported unmet medical, psychological and legal needs (Vandenbussche 2022). Finding clinicians is covered on detransition healthcare; the support directory lists therapists and groups.

Lawsuits

The new limitation periods help only people treated in those states, and mostly only those treated as minors; North Carolina's HB 805 is the exception in covering adults. Many detransitioners outside them find out too late:

I tried but it was after the statute of limitations for mine. —thisonesathrowawway, detrans female

Therapy, bathrooms and youth bans

Many commenters believed state conversion therapy laws stopped therapists from exploring alternatives to transition. This is a perception of the laws' effect rather than a reading of their text, and Chiles has since limited how far such laws can reach into talk therapy:

Professionals can't question you or recommend different types of therapy to resolve the problem as it's considered "conversion therapy". —duffmanhb

Bathroom laws cut both ways for detransitioners who do not yet look like their sex, a group that overlaps with gender non-conforming people generally. Some support them:

As someone who doesn't always "pass" as my sex- if I have to be occasionally inconvenienced and embarrassed- I would gladly make this sacrifice rather than have my daughters using the bathroom with adult males in proximity. —L82Desist, detrans female

Others see a risk to anyone who does not fit expectations:

Why the hell enforce "sex-based" bathroom laws if they can't even tell us apart? —Exit9C, detrans female

On youth bans, many r/detrans commenters welcome them while asking what replaces medical treatment:

As much as it is a good thing, i feel for all the young and lost kids deeply caught in the trans movement at the moment. … I really hope that some kind of support that does not enable them is instated, because it's not everything to just ban it, we must *really* protect them. —Beneficial_Tie_4311, detrans female

A minority oppose restrictions on adults on principle:

I think medical transition is a terrible idea, of course, but it's not the state's job to limit what rights-holding adult people can do to their own bodies. —wide_gyres, desisted female

Trans perspectives

Trans commenters describe the same laws as a loss of legal recognition and safety. Many see Skrmetti's reasoning as a template for further restrictions:

The Supreme Court Will green light all targeting of trans people by saying "you're not discriminating against them by demographic, you're discriminating against them by medical diagnosis". —Floofy_taco, trans woman (MTF)

Others describe holding documents that contradict each other across agencies and states:

The difference between federal & state documents & crap that some say F & some say M is insane for me. —Whatdadogdoin5, trans woman (MTF)

Trans and detrans commenters share that complaint: fast-changing rules leave people with mismatched records. They disagree on whether recording birth sex is accurate record-keeping or forced disclosure.

Limitations

• This page draws on legislation, court records, government pages and news reports up to October 2026. Orr v. Trump, the Kansas SB 244 challenge, the Mosley appeal, the FTC litigation and the CMS hospital rule were unresolved, and counts of states change often.
• State counts come from different trackers (KFF, MAP, news outlets) that define laws differently; MAP and similar trackers are advocacy organisations.
• Comments quoted here come from a self-selected online community and illustrate experiences; they do not measure how common those experiences are.

Related pages

• Sex and gender identity law around the world
• Detransition lawsuits
• Social and practical detransition
• Social transition at school
• Evidence reviews
• Gender exploratory therapy

References

• Littman (2021). Individuals treated for gender dysphoria with medical and/or surgical transition who subsequently detransitioned: a survey of 100 detransitioners. study page.
• Vandenbussche (2022). Detransition-related needs and support: a cross-sectional online survey. study page.
• detrans.ai (2026). r/detrans timeline statistics. source.
• Executive Order 14168 (2025). govinfo. Executive Order 14187 (2025), Clearinghouse. Executive Order 14201 (2025), Congressional Research Service R48448, source.
• Orr v. Trump: D. Mass. (2025), FindLaw; Trump v. Orr, No. 25A319 (US Supreme Court, 6 November 2025), source; No. 25-1579 (1st Cir. 2026), FindLaw, CourtListener; ACLU case page (advocacy), source; Lambda Legal (advocacy), source.
• United States v. Skrmetti, No. 23-477 (US Supreme Court, 18 June 2025). source. Commentary: Federalist Society, source; University of Michigan Law School, source; NEA (advocacy), source.
• Bostock and EEOC: Littler (2026), source; CUPA-HR (2026), source; Ogletree (2025), source; Out & Equal (advocacy), source.
• Title IX: McGuireWoods (2025) on Tennessee v. Cardona, source. West Virginia v. B.P.J. / Little v. Hecox (2026): Foley Hoag, source; USA Today, source.
• Chiles v. Salazar (2026): Free Speech Center at MTSU, source; American Psychological Association, source. Mirabelli v. Bonta (2026): Justia, source; Clark Hill, source; MultiState, source.
• US Department of Health and Human Services (2025). Treatment for Pediatric Gender Dysphoria: Review of Evidence and Best Practices. source; press release, source; SEGM, source.
• Kennedy declaration and CMS rules: Health Affairs (2026), source; Potomac Law (2026), source; Epstein Becker Green, source; Crowell (2026), source; AJMC (2026), source; Federal Register proposed hospital rule (2025), source; NPR (2026), source.
• FTC (2025). Request for public comment, source. California Attorney General (2026), source. US News (2026), source. Endocrinology Advisor (2026), source.
• Social Security: Law Dork (2025), source.
• State youth bans: KFF policy tracker (2026), source; FindLaw, source; USA Today (2023) on Tennessee SB1, source.
• Sex-definition laws: Poynter (2024), source; Jackson Lewis (2025), source; Ogletree (2025), source; Rubin Fortunato (2025), source; The Center Square, source; MAP (advocacy), source, source.
• Texas: TexasLawHelp on Opinion KP-0489, source; Texas Tribune (2025) on SB 8, source, source; SB 1257: LegiScan, source; Texas Scorecard (partisan outlet), source; Equality Texas (advocacy), source.
• Kansas SB 244: Topeka Capital-Journal (2026), source; Lawrence Times (2026), source; Lawrence Journal-World (2026), source; ACLU of Kansas (advocacy), source, source.
• Bathrooms: The Advocate (2026), source.
• North Carolina: House Bill 805 (2025), source; WUNC (2025), source; UNC School of Government (2023) on H808, source; WRAL (2026) on Mosley v. Emerson, source.
• Montana: Montana Code Annotated 33-22-149, source; HB 682 (2025), BillTrack50, source; translegislation.com (advocacy), source; Citizen Portal, source.
• Tennessee HB 754 (2026): Tennessean, source; Lawyers for Good Government (advocacy), source; LGBTQ Nation (advocacy), source.
• Arkansas Advocate (2025), source. Washington Examiner (2026), source. The Federalist (2026, partisan outlet) on the TRUTH in Coverage Act, source.
• US Department of Labor. Women's Health and Cancer Rights Act. source.