Hormone replacement therapy (HRT) — increasingly called menopausal hormone therapy (MHT) — is one of the most effective, and most misunderstood, options for managing menopause symptoms. This is a plain-language explainer of what it is, who it may suit, and the honest benefit-versus-risk picture, so you can have a more informed conversation with a clinician. It is not a recommendation to start or stop any treatment. For the bigger picture, see our menopause hub and the in-depth complete guide to menopause.
What is hormone replacement therapy for menopause?
Menopause happens as the ovaries wind down and estrogen falls, which drives many of the symptoms women notice through midlife. HRT works by replacing some of that hormone. It comes in two broad types:
- Estrogen-only therapy — for women who have had a hysterectomy (no uterus).
- Combined therapy — estrogen plus a progestogen (progesterone or a synthetic progestin), used when you still have a uterus. The progestogen protects the uterine lining, because unopposed estrogen can raise the risk of endometrial cancer. Our explainer on estrogen versus progesterone covers why both hormones matter.
HRT is different from the hormone tests some clinics push. For most women in a typical menopause transition, the decision to use it rests mainly on symptoms and health history, not on a blood panel.
Who might HRT suit — and the timing that matters
The evidence points to a "window of opportunity." For healthy women who are under 60, or within about 10 years of their final period, and who have bothersome symptoms, the benefits of HRT often outweigh the risks. Starting much later — or many years after menopause — shifts that balance, with a less favourable risk profile.
HRT is also specifically considered for women who reach menopause early. Clinicians distinguish premature menopause, also called primary ovarian insufficiency, which occurs before age 40, from early menopause between the ages of 40 and 45. In both situations, HRT is generally recommended — unless there is a specific reason to avoid it — at least until the usual age of natural menopause (around 51), because it helps protect long-term bone and heart health during the years the body would otherwise still be producing estrogen.
What HRT helps with
HRT has strong evidence for some things and weaker or mixed evidence for others. The clearest benefits are:
- Vasomotor symptoms. HRT is the most effective treatment for hot flashes and night sweats — the vasomotor symptoms many women find most disruptive.
- Genitourinary symptoms (GSM). Low-dose vaginal estrogen effectively treats vaginal dryness, discomfort, and some urinary symptoms, with very little absorbed into the bloodstream.
- Bone protection. HRT reduces bone loss and lowers fracture risk while you take it.
Many women also report better sleep and mood once night sweats settle, which can indirectly ease insomnia and brain fog. Evidence for HRT directly treating concerns like low libido, joint pain, or weight gain is more limited and mixed — it may help some women, but it isn't a guaranteed fix and shouldn't be started for those reasons alone.
The forms HRT comes in
HRT isn't one product. The form and dose are tailored to you, and the route can change the risk profile — notably, estrogen absorbed through the skin (patches, gels, sprays) appears to carry a lower risk of blood clots than tablets taken by mouth.
| Form | How it's used | Typically best for |
|---|---|---|
| Tablets (oral) | Daily pill, estrogen alone or combined | Convenience; whole-body symptoms |
| Patches | Applied to skin, changed once or twice weekly | Whole-body symptoms; lower clot risk than tablets |
| Gels & sprays | Rubbed onto the skin daily, dose adjustable | Flexible dosing; skin-route benefits |
| Vaginal (cream, ring, pessary) | Low-dose estrogen applied locally | Vaginal dryness and urinary symptoms (GSM) |
| Progestogen | Pill, part of a combined product, or a hormonal IUD | Uterine protection alongside estrogen |
Vaginal estrogen is worth singling out: because so little enters the bloodstream, it's generally considered suitable even for many women who can't take whole-body HRT.
The honest benefit-and-risk picture — and the WHI story
Much of the fear around HRT traces back to the Women's Health Initiative (WHI), large studies published in the early 2000s. Early headlines suggested HRT raised the risk of breast cancer, heart disease, and stroke, and prescriptions dropped sharply. Since then, researchers have re-examined the data and understanding has evolved considerably:
- The women studied were older on average (often well past menopause), so the findings didn't reflect the typical woman starting HRT in her early 50s for symptoms.
- Risks depend heavily on type, dose, route, age, and how long you use it — not a single blanket number.
- For symptomatic women under 60 or within 10 years of menopause, major guideline bodies now agree the benefits often outweigh the risks.
That said, the risks are real and shouldn't be dismissed. Combined (estrogen-plus-progestogen) HRT is associated with a small increase in breast cancer risk that rises with longer use and appears to decline after stopping; estrogen-only therapy carries little or no such increase. Oral HRT carries a small increase in the risk of blood clots and stroke, which is lower with skin-based routes. The overall absolute risk for a healthy woman in the treatment window is generally small — but "small" is not "zero," which is exactly why it's a personal, clinician-guided decision.
When HRT may not be suitable
HRT isn't right for everyone. A clinician will generally be cautious, or advise against systemic HRT, if you have a history of:
- Breast cancer or certain other hormone-sensitive cancers
- Blood clots (deep vein thrombosis or pulmonary embolism) or a clotting disorder
- Stroke or a heart attack, or uncontrolled high blood pressure
- Active liver disease
- Unexplained vaginal bleeding that hasn't been investigated
Even then, options may exist — for example, low-dose vaginal estrogen for local symptoms, or non-hormonal treatments. Prescription non-hormonal choices a clinician might discuss include certain SSRIs and SNRIs, gabapentin, and the newer targeted drug fezolinetant; each has its own benefits and risks and, like HRT, is a decision to weigh with a professional, never to start or stop on your own.
How the decision actually gets made
HRT is an individualized choice, not a one-size-fits-all prescription. A good consultation weighs your symptoms and how much they affect your life, your age and time since menopause, your personal and family medical history, and your own preferences. Many clinicians aim for the lowest effective dose that controls your symptoms, then review it periodically — often after the first few months and then roughly once a year — to check how you are doing and reconsider the balance of benefits and risks. There is no fixed maximum time to stay on HRT; how long you continue is a personal decision revisited over time rather than a strict cut-off date. If you're not sure where to start, help from a menopause specialist can be valuable. Lifestyle still matters alongside any treatment — a balanced diet and regular exercise support bone, heart, and overall wellbeing.
When to talk to a clinician
Speak with a doctor or menopause specialist if symptoms are disrupting your sleep, work, mood, or relationships, or if you simply want to understand your options. See someone promptly for any bleeding after menopause, bleeding while on HRT that's new or heavy, or symptoms of a blood clot — leg pain or swelling, chest pain, or breathlessness — which need urgent care. HRT can be started, adjusted, or stopped safely, but always as a shared decision with a professional who knows your full history, especially given HRT's role in supporting heart and bone health over the long term.
