Feminizing Hormone Therapy, the honest version 🌸

Feminizing hormone therapy generally means two, sometimes three, categories of medication working together: estrogen, something to block or lower testosterone, and, for a smaller and newer conversation, progesterone. None of the specific drugs or doses below are a prescription. They're what the major guidelines actually describe, so a conversation with your own prescriber starts from real information instead of a guess.

Estrogen (estradiol)

Almost everyone means 17-beta estradiol specifically: the same molecule a cisgender ovary makes, not a synthetic analogue. It comes in a few delivery forms, and the route matters as much as the dose:

Anti-androgens and testosterone suppression

Estrogen alone doesn't fully suppress testosterone in someone with testes, so it's almost always paired with something that does:

There's a wide range of typical dosing across these, and it varies by route, by clinic, and by country, so I'm deliberately not listing numbers here. The guidelines linked at the bottom of this page spell out the actual ranges if you want to see what your prescriber is working from.

My clinic (Foria) has me take estradiol sublingually, and specifically: place the tablet under my tongue, let it sit until it visibly starts dissolving, then swallow the rest instead of spitting it out or letting the whole thing dissolve completely. It's a small instruction that turns out to be doing two different things at once.

Some of the dose gets absorbed straight through the tissue under the tongue, into the bloodstream directly. That fraction skips hepatic first-pass metabolism: the liver's habit of processing anything you swallow before it ever reaches general circulation, converting a chunk of it into weaker estrogen metabolites before the "real" version gets a chance to act. The rest of the tablet, the part you swallow, goes through the gut and liver the normal way, just like a plain oral dose. So instead of one absorption pathway, you get two: a faster one that bypasses the liver, and a slower one that doesn't.

Practically, a few things that make the technique work the way it's meant to: take it at roughly the same times each day so absorption stays predictable, avoid eating or rinsing your mouth out immediately after so the sublingual portion has time to absorb, and don't chew or swallow it immediately: the "let it start dissolving" part is the part doing the work.

Progesterone is the newer, less settled part of this conversation, and it's worth understanding separately from estrogen because the evidence base is a different shape entirely. In a cisgender menstrual cycle, progesterone acts after estrogen, and it's theorized to drive the second stage of breast tissue maturation: the lobuloalveolar development that comes after estrogen has already driven ductal growth. Whether that same mechanism transfers cleanly to feminizing hormone therapy has, until recently, been mostly theory and anecdote.

So why the 12-month wait? That's my own reading of the study design, not a claim the researchers made explicitly: the trial only enrolled people who already had a full year of stable estrogen exposure behind them, which means any breast growth measured afterward could be attributed to the progesterone (and dose changes) added on top, not to the ordinary early-HRT development estrogen alone already causes in year one. Clinics that wait roughly a year before offering progesterone, mine included, appear to be leaning on similar logic: let estrogen do its early work and get your dosing stable first, then progesterone becomes a distinguishable variable instead of a confound.

It's important to say plainly that this isn't yet a settled standard of care. Rainbow Health Ontario's guideline describes progestins as "generally not routinely recommended," citing a historical lack of clear benefit, though it notes they may be considered on patient request after an informed discussion. The UK's NHS pathway is more direct still, stating providers do not routinely prescribe or recommend progesterone due to insufficient evidence and uncertain long-term risk. Neither the WPATH Standards of Care, version 8, nor the Endocrine Society's clinical practice guideline, make progesterone a routine part of feminizing hormone therapy. The Amsterdam trial is genuinely the strongest evidence yet in favour of it doing something real, and it's still one trial. Treat it as a legitimate conversation to bring to your own prescriber, not as something you're behind on if you're not taking it.

The timeline below is built entirely from published clinical guidelines, not my own chart, mainly Rainbow Health Ontario's published onset and plateau data, cross-checked against the Endocrine Society guideline. Genetics, age at start, dose, and route all shift these ranges around, sometimes by a lot, and none of it is a promise or a race. I've noticed things move faster in some categories than others myself, which matches what the sources below describe: it's not usually one smooth curve, it's several different clocks running at once.

Bar length below shows roughly how soon a change is typically first noticeable, not its size or its certainty. Every bar has its real timeframe written out in text for exactly that reason.

The same information, laid out chronologically

1. 1–3 months

   The earliest, quietest changes

   Libido and spontaneous erections usually shift first, along with mood and emotional range for a lot of people. Nothing visible yet for most, which is often the hardest stretch precisely because it's working before it's showing.

2. 3–6 months

   Most of the list starts at once

   Skin, fat redistribution, breast tissue, testicular volume, and muscle mass all typically begin shifting in this window. This is usually the first stretch where changes are noticeable to other people, not just to you.

3. 6–12 months

   Hair joins in, and dosing usually stabilizes

   Facial and body hair thinning tends to start later than everything else and moves slowly. This is also roughly when bloodwork and dosing settle into a maintenance rhythm for a lot of people, and the window some clinics use to consider adding progesterone.

4. 1–2 years

   Continued development, not a finish line

   Breast growth, fat redistribution, and muscle changes keep progressing through here for most people, generally more slowly than the first six months but still moving.

5. 2–3 years

   Where the guidelines say most physical change plateaus

   The Endocrine Society and Rainbow Health Ontario both describe this as roughly where maximal feminization is typically reached. "Typically" is doing real work in that sentence. Plenty of people keep noticing smaller changes well past this point.

Hormones do a lot of the physical work on their own, but what you eat and how you sleep changes how well your body handles that work, and it's the one part of this you have full control over on day one, regardless of where your levels are at.

The mental health part, said plainly

Nothing above the neck moves on the same schedule as the chart further up this page, and that mismatch is one of the harder parts of early transition. Progress isn't linear day to day, comparing your timeline to someone else's is close to meaningless given how much genetics and dose and age shift things around, and the bad-mirror days don't erase the good months around them. A therapist, a support group, or just people who've been through it themselves tend to help more here than anything a website can offer, and I'd rather say that honestly than pretend a page like this is a substitute for it.