Hormone Replacement Therapy (HRT) is the use of hormones to align a person's physical characteristics with their gender identity. It is one of the most common and well-studied forms of gender-affirming care.
Informed Consent Model
Under informed consent, a patient can begin HRT after being educated about the effects, risks, and alternatives, and providing written consent. No therapist letter or diagnosis of gender dysphoria is required. Many clinics (such as Planned Parenthood locations, LGBTQ+ health centers, and some telehealth providers) operate under this model.
Gatekeeper / Traditional Model
Some providers require a letter from a mental health professional diagnosing gender dysphoria before prescribing hormones. This model is becoming less common but still exists, particularly outside of major cities and in some countries outside the US.
WPATH Standards of Care
The World Professional Association for Transgender Health (WPATH) publishes Standards of Care (currently version 8, released 2022) which provide clinical guidance. SOC8 supports the informed consent model for adults and provides frameworks for adolescent care.
Feminizing HRT (MTF / Transfeminine)
Feminizing hormone therapy uses estrogen (often combined with an anti-androgen) to develop feminine secondary sex characteristics and reduce masculine ones.
Estrogen
Estrogen is the primary feminizing hormone. It promotes breast development, fat redistribution, softer skin, and emotional changes.
Forms of Estrogen
Form
Common Names
Typical Dose
Notes
Oral (pills)
Estradiol (Estrace)
2-8 mg/day
Convenient; can be taken sublingually for better absorption and to bypass liver first-pass
Sublingual
Estradiol (dissolved under tongue)
1-4 mg, 2-3x/day
Higher bioavailability than swallowed; more stable levels if split into multiple doses
Transdermal patches
Climara, Vivelle-Dot
0.1-0.4 mg/day (patch strength)
Steady levels; lower clot risk; changed 1-2x/week
Injectable (IM/SubQ)
Estradiol Valerate, Estradiol Cypionate
EV: 2-10 mg/week; EC: 2-5 mg every 2 weeks
Very effective; consistent levels; self-injectable
Topical gel/cream
EstroGel, Divigel
1-4 pumps/day
Applied to skin daily; good for fine-tuning doses
Pellets (implants)
Estradiol pellets
25-150 mg every 3-6 months
Inserted under the skin; very stable levels; less commonly available in the US
Sublingual tip: Dissolving estradiol tablets under the tongue (sublingual) or between the cheek and gum (buccal) bypasses liver metabolism, resulting in higher estradiol levels with lower estrone levels compared to swallowing. This can be done with standard oral estradiol tablets.
Anti-Androgens
Anti-androgens reduce the effects of testosterone. They are often used alongside estrogen, especially early in transition, though some protocols achieve testosterone suppression through estrogen alone (estrogen monotherapy).
Medication
Typical Dose
Mechanism
Notes
Spironolactone
50-200 mg/day
Androgen receptor blocker + mild testosterone production reducer
Most common in US; diuretic; monitor potassium; can cause dizziness; may need to be taken with food
Very potent; not available in US; available in Europe, Canada, many other countries; risk of liver issues and meningioma at high doses
Bicalutamide
25-50 mg/day
Non-steroidal androgen receptor blocker
Does not lower testosterone levels but blocks its effects; rare but serious liver risk; monitor liver enzymes
GnRH Agonists/Antagonists
Varies (injection monthly or longer)
Shuts down gonadal hormone production entirely
Very effective; expensive without insurance; includes Lupron, Supprelin
5-alpha Reductase Inhibitors
Finasteride 1-5 mg/day, Dutasteride 0.5 mg/day
Blocks conversion of testosterone to DHT
Primarily used for hair loss prevention; does not lower total T; sometimes added alongside other anti-androgens
Progesterone
The role of progesterone in feminizing HRT is debated. Some providers prescribe it, and many trans women report subjective benefits.
Potential benefits: May aid breast development (particularly rounding/Tanner stage 4-5 maturation), improved sleep, improved mood, increased libido
Common form: Micronized bioidentical progesterone (Prometrium), typically 100-200 mg taken rectally at bedtime for best bioavailability
Timing: Often introduced after 1-2 years of estrogen, or after breast development has reached Tanner stage 3
Risks: May slightly increase cardiovascular risks; insufficient long-term data specific to trans women; some report mood changes
Estrogen Monotherapy
Some protocols use high-dose estrogen (often injectable) without an anti-androgen. Sufficiently high estradiol levels (typically above 200 pg/mL) suppress testosterone production through negative feedback on the hypothalamic-pituitary-gonadal axis. This avoids the side effects of anti-androgens but requires careful monitoring.
Expected Feminizing Effects
Effect
Onset
Maximum Effect
Reversible?
Breast development
3-6 months
2-3 years
No
Skin softening, less oiliness
3-6 months
Unknown
Yes
Fat redistribution (hips, thighs, face)
3-6 months
2-5 years
Yes
Decreased muscle mass/strength
3-6 months
1-2 years
Yes
Reduced body/facial hair growth
6-12 months
3+ years
Yes
Reduced/stopped male-pattern baldness
1-3 months
1-2 years
Yes (loss resumes if stopped)
Decreased testicular volume
3-6 months
2-3 years
Unknown
Decreased libido (initially)
1-3 months
Varies
Yes
Emotional changes
First few weeks-months
Varies
Yes
Reduced erections/ejaculation
1-3 months
3-6 months
Yes
Decreased fertility
Variable
Variable
Possibly not after extended use
What HRT does NOT change: Voice pitch (for transfeminine people — voice training is needed), bone structure (height, shoulder width, jaw — only soft tissue changes), beard hair that has already matured (electrolysis or laser needed).
Masculinizing HRT (FTM / Transmasculine)
Masculinizing hormone therapy uses testosterone to develop masculine secondary sex characteristics.
Forms of Testosterone
Form
Common Names
Typical Dose
Notes
Injectable (IM/SubQ)
Testosterone Cypionate, Testosterone Enanthate
50-100 mg/week or 100-200 mg every 2 weeks
Most common; effective; self-injectable; SubQ injections are equally effective to IM
Topical gel
AndroGel, Testim, Vogelxo
25-100 mg/day
Applied daily to skin; steady levels; avoid skin-to-skin contact with others at application site
Topical cream
Compounded testosterone cream
50-200 mg/day
Similar to gel; often compounded at specialty pharmacies
Patches
Androderm
2-6 mg/day
Changed daily; can cause skin irritation
Pellets
Testopel
150-450 mg every 3-6 months
Inserted under skin; very stable levels; less commonly used
Nasal gel
Natesto
11 mg per nostril, 2-3x/day
Newer option; no skin transfer risk; requires frequent dosing
Oral (undecanoate)
Jatenzo
158-396 mg twice daily
Newer FDA-approved oral option; taken with food
SubQ vs IM injections: Subcutaneous (SubQ) testosterone injections are equally effective, often less painful, and use shorter needles than intramuscular (IM) injections. Many providers now prefer SubQ for patient comfort.
Low-Dose Testosterone
Some transmasculine people choose low-dose testosterone for more gradual changes or to achieve a more androgynous appearance. Typical low-dose ranges are 20-40 mg/week injected, or proportionally reduced topical doses. The same changes occur, just more slowly.
Expected Masculinizing Effects
Effect
Onset
Maximum Effect
Reversible?
Voice deepening
3-12 months
1-2 years
No
Facial hair growth
6-12 months
5+ years
No
Increased body hair
6-12 months
5+ years
No
Increased muscle mass/strength
6-12 months
2-5 years
Yes
Fat redistribution (abdomen)
3-6 months
2-5 years
Yes
Cessation of menstruation
2-6 months
6-12 months
Yes
Clitoral growth (bottom growth)
3-6 months
1-2 years
No
Skin oiliness/acne
1-6 months
1-2 years
Yes
Male-pattern baldness (if genetic)
6-12 months
Variable
No
Increased libido
First few weeks-months
Varies
Yes
Emotional changes
First few weeks-months
Varies
Yes
Decreased fertility
Variable
Variable
Often (but not always) reversible
Vaginal atrophy/dryness
3-6 months
1-2 years
Yes
Blood Work & Monitoring
Regular blood work is essential for safe HRT. It ensures hormone levels are in the correct range and monitors for potential health issues.
Standard Labs for Feminizing HRT
Estradiol (E2): Target 100-200 pg/mL for most; higher (200-300 pg/mL) for monotherapy to suppress T
Total Testosterone: Target below 50 ng/dL (cisgender female range)
Prolactin: Checked periodically; estrogen can raise prolactin levels
Liver function (ALT, AST): Especially important with oral estrogen, CPA, or bicalutamide
Potassium: Required if taking spironolactone (which is potassium-sparing)
Lipid panel: Estrogen can affect cholesterol levels
Complete Blood Count (CBC): Baseline and periodic monitoring
Hemoglobin A1c or fasting glucose: Diabetes screening
Standard Labs for Masculinizing HRT
Total Testosterone: Target 300-1000 ng/dL (cisgender male range); trough levels for injections
Free Testosterone: Sometimes checked if symptoms don't match total T
Estradiol: Some is normal (testosterone aromatizes to estradiol); typically not a concern unless very high
Complete Blood Count: Testosterone increases red blood cell production; watch for polycythemia (hematocrit above 50-54%)
Lipid panel: Testosterone can decrease HDL cholesterol
Liver function: Baseline and periodic
Metabolic panel: Kidney function, glucose
Monitoring Schedule
Timepoint
What's Checked
Baseline (before starting)
Full panel: hormones, CBC, CMP, lipids, liver, A1c
3 months
Hormone levels, CBC, electrolytes (potassium if on spiro)
6 months
Full panel repeat
12 months
Full panel repeat
Annually thereafter
Hormones, CBC, CMP, lipids — more frequently if dose changes
Timing of blood draw: For injectable hormones, labs should typically be drawn at the trough — right before your next injection — to get the lowest point in your cycle. This helps ensure your levels don't dip too low.
Expected Timelines
HRT is a gradual process. Changes happen over months and years, not days or weeks. Results vary significantly between individuals based on genetics, age, dosage, and other factors.
Patience is key: Most people see the majority of changes within the first 2-3 years, but subtle changes can continue for 5+ years. Comparing yourself to others' timelines is natural but remember that everyone's body responds differently.
General Milestones (Feminizing)
Week 1-4: Possible emotional changes, decreased libido, softer skin beginning
Month 1-3: Breast budding (can be tender/sore), decreased spontaneous erections, possible mood changes
Month 3-6: Noticeable breast growth, skin changes, early fat redistribution, decreased muscle mass
Month 6-12: Continued breast development, noticeable fat redistribution, reduced body hair growth rate
Year 1-2: Significant breast development, facial feminization from fat redistribution, continued body changes
Year 2-5: Continued gradual breast growth and fat redistribution; changes slow down
Month 1-3: Menstruation stopping, oilier skin, possible acne, continued bottom growth
Month 3-6: Voice beginning to crack/deepen, early fat redistribution, possible peach-fuzz facial hair
Month 6-12: Voice dropping more noticeably, increasing body hair, muscle development, facial changes
Year 1-3: Significant voice change, facial hair development (patchy to fuller), body composition changes
Year 3-5+: Continued facial hair development, possible male-pattern baldness, body hair continues filling in
Risks & Side Effects
Feminizing HRT Risks
Venous thromboembolism (blood clots): Slightly elevated risk, especially with oral estrogen and smoking. Risk is lower with transdermal or injectable routes. Stop smoking if possible.
Cardiovascular: Estrogen may slightly elevate cardiovascular risk; monitoring lipids and blood pressure is important
Liver effects: Oral estrogen passes through the liver; transdermal/injectable routes are safer for the liver
Gallstones: Slightly increased risk
Prolactinoma: Rare; estrogen can elevate prolactin levels; monitor if symptoms (headache, vision changes)
Bone density: Generally maintained or improved with adequate estrogen levels; risk increases if hormones are too low (especially after orchiectomy without adequate hormone replacement)
Infertility: May become permanent with long-term use; sperm banking recommended before starting if fertility preservation is desired
Mood changes: Some people experience depression or mood swings, especially when dialing in doses
Masculinizing HRT Risks
Polycythemia (high red blood cells): Most common risk; testosterone stimulates red blood cell production; can increase clot risk if hematocrit gets too high; managed by dose adjustment or blood donation
Cardiovascular: Testosterone can decrease HDL ("good") cholesterol; long-term cardiovascular effects are still being studied
Liver effects: Generally minimal with modern forms; oral testosterone had more liver concerns historically
Acne: Very common, especially in the first 1-2 years; typically manageable with skincare
Hair loss: Male-pattern baldness can develop if genetically predisposed; finasteride/minoxidil can help
Vaginal atrophy: Can cause discomfort, dryness, or pain; topical estrogen cream can help without significantly affecting testosterone levels
Infertility: Often reversible upon stopping testosterone, but not guaranteed; egg freezing recommended before starting if desired
Mood changes: Increased irritability in some; emotional range may shift
Smoking and HRT: Smoking significantly increases the risk of blood clots and cardiovascular complications with estrogen therapy. If you smoke, strongly consider quitting before or while starting feminizing HRT. This is one of the most important risk factors you can control.
DIY HRT & Harm Reduction
Some trans people choose to self-medicate with hormones obtained without a prescription, often due to barriers to accessing care (cost, location, gatekeeping, lack of providers, or wait times). While working with a medical provider is always recommended, harm reduction information can help keep those who self-medicate safer.
Why People DIY
No informed consent providers in their area
Cannot afford provider visits or insurance
Excessive wait times (sometimes months to years)
Gatekeeping requirements they cannot or do not want to meet
Living in a country or state where trans healthcare is restricted
Being a minor without supportive parents
Harm Reduction Principles
Get blood work: Even without a prescribing doctor, you can order blood tests through services like Walk-In Lab, Quest Direct, or similar services. Monitor your hormone levels and health markers.
Use pharmaceutical-grade medications: Purchase from reputable sources. Community resources can help identify trusted sources.
Start low, go slow: Begin with lower doses and increase gradually. This is safer and produces better results than starting high.
Research your specific medications: Understand dosing, administration, half-life, and side effects of everything you take.
Don't use premarin or ethinyl estradiol: Use bioidentical estradiol only. Synthetic estrogens (like those in birth control pills) have significantly higher clot risk.
Avoid high-dose CPA: If using cyproterone acetate, keep doses at 12.5 mg/day or less. Higher doses significantly increase risks without additional benefit.
Learn proper injection technique: If injecting, research sterile technique, proper needle gauges, and injection sites. SubQ injections are easier and less risky than IM for self-administration.
This is not an endorsement of DIY HRT. Working with a qualified medical provider is always the safest option. This information exists because people will self-medicate regardless, and access to accurate information reduces harm.
Getting Access to HRT
Informed Consent Clinics
Planned Parenthood: Many locations offer HRT on an informed consent basis, often with same-week appointments. Call to confirm your local office provides this service.
LGBTQ+ health centers: Organizations like Fenway Health, Callen-Lorde, Howard Brown, Whitman-Walker, and Lyon-Martin offer specialized trans healthcare.
Community health centers: Federally Qualified Health Centers (FQHCs) often offer sliding-scale fees and some provide HRT.
Telehealth Options
Plume: Subscription-based trans telehealth; offers HRT, lab work, and letters; available in most US states
FOLX Health: Similar to Plume; offers HRT and trans healthcare via telehealth
QueerDoc: Telehealth platform focused on LGBTQ+ healthcare
Planned Parenthood Direct: Some locations offer telehealth HRT appointments
Finding a Provider
WPATH Provider Directory: Search for WPATH-affiliated providers
Trans community recommendations: Local trans support groups and online communities often maintain lists of trans-friendly providers
Psychology Today: Filter therapists by transgender specialty (if a letter is needed)
Insurance & Cost
Insurance Coverage
Many insurance plans now cover HRT for transgender patients. The ACA (Affordable Care Act) prohibits discrimination based on sex, which has been interpreted to include gender identity in many jurisdictions.
Most employer-sponsored and marketplace plans cover HRT medications
Medicaid coverage varies by state — many states now cover HRT under Medicaid
Medicare covers HRT for transgender beneficiaries
Some plans may require a diagnosis code of gender dysphoria (F64.0 or F64.9)
If initially denied, appeal — many denials are overturned
Approximate Costs Without Insurance
Medication
Approximate Monthly Cost
Estradiol pills (generic)
$4-30
Estradiol patches
$30-100
Estradiol Valerate injectable
$20-80 (multi-month supply)
Spironolactone
$4-20
Progesterone (generic)
$10-30
Testosterone Cypionate injectable
$20-80 (multi-month supply)
Testosterone gel
$30-200 (brand-dependent)
Cost-saving tips: Use GoodRx or similar discount programs for prescriptions. Generic medications are much cheaper than brand-name. Manufacturer coupons exist for many brand-name medications. Patient assistance programs are available for those who qualify based on income.
Frequently Asked Questions
Can I start HRT without therapy first?
Yes, under the informed consent model. Many clinics (including Planned Parenthood) prescribe HRT after a single appointment where risks and benefits are discussed. No therapy or diagnosis is strictly required for adults at informed consent clinics.
How old do I need to be?
For adults (18+), informed consent is available at many providers. For minors, parental/guardian consent is typically required, and providers generally follow WPATH SOC8 guidelines which support puberty blockers at early puberty (Tanner stage 2+) and hormone therapy typically around age 14-16, though this varies by provider and jurisdiction. Note: laws around minor access to HRT are rapidly changing in many US states.
Can I take HRT if I'm non-binary?
Yes. Many non-binary people take hormones, sometimes at standard doses and sometimes at lower doses or for limited periods to achieve specific changes. Informed consent providers will work with you on your individual goals.
What if I want to stop HRT?
You can stop HRT at any time. Some changes will reverse (fat redistribution, muscle changes, skin changes) while others are permanent (breast development from estrogen, voice deepening from testosterone, facial hair from testosterone). If you've had an orchiectomy or oophorectomy, you'll need some form of hormone replacement for bone health.
Will HRT make me infertile?
HRT can reduce or eliminate fertility, but this isn't guaranteed, and it should never be relied upon as birth control. If fertility preservation is important to you, discuss banking sperm or eggs before starting HRT. Fertility may partially return after stopping HRT, but this is not guaranteed, especially after years of use.
Can I take hormones while breastfeeding?
This is a complex question that should be discussed with a healthcare provider familiar with both lactation and trans healthcare. Testosterone is generally contraindicated during breastfeeding. Estrogen may affect milk supply. Always consult your provider.
Does HRT interact with other medications?
Some medications can interact with HRT. Always inform your prescriber about all medications you take. Notable interactions include: spironolactone with ACE inhibitors or potassium supplements (hyperkalemia risk), estrogen with some anticonvulsants and antiretrovirals (reduced effectiveness), and smoking with estrogen (increased clot risk).