The main deciding factor is simple: whether or not you still have a uterus. Women who have had a hysterectomy can generally use estrogen-only HRT, while women who still have a uterus usually need combined HRT — estrogen plus a progestogen. The progestogen isn't added for symptom relief; it's there to protect the lining of the womb. Combined HRT then comes in two rhythms, cyclical and continuous, which mostly differ in whether you have a monthly bleed.
Estrogen-only vs. combined HRT: the core difference
Estrogen is the hormone that does most of the work for classic menopause symptoms such as hot flashes, night sweats, and vaginal dryness. Estrogen-only HRT uses estrogen on its own. Combined HRT pairs that same estrogen with a progestogen — a term that covers both natural (body-identical) progesterone and synthetic progestins. For a deeper look at how these two hormones behave, see our guide to estrogen vs. progesterone, and our overview of hormone replacement therapy.
Why a progestogen matters if you have a uterus
When estrogen is taken on its own, it tends to make the lining of the uterus (the endometrium) thicken over time. Left unopposed, that thickening can raise the risk of endometrial, or uterine, cancer. A progestogen counterbalances estrogen's effect on the lining, which is why clinicians add it for anyone who still has a uterus. This is a well-established, routine part of prescribing — not a rare precaution. Women who no longer have a uterus don't need this protection, so estrogen alone is generally appropriate for them. You can read more about the progestogen half of the equation in our piece on progesterone for menopause.
Cyclical vs. continuous combined HRT
If you need combined HRT, there are two common ways to take it, and the difference shows up mainly in your bleeding pattern.
Cyclical combined HRT (also called sequential HRT) means taking estrogen every day and adding a progestogen for part of each month. This schedule usually produces a regular, predictable monthly bleed, a bit like a light period. It's often used for women who are perimenopausal or still having some natural periods. Where you are in the transition matters here — our guide to the stages of menopause can help you place yourself.
Continuous combined HRT means taking both estrogen and a progestogen every day with no break, and it's designed to be bleed-free over time. It's typically used once you're postmenopausal. Irregular spotting is common in the first few months as your body settles, and for many women it eases off. Any new, heavy, or persistent bleeding — especially after you've been bleed-free — is worth reporting, since it should be checked rather than assumed.
| Type of HRT | Who it's generally for | Needs a progestogen? | Typical bleeding pattern | Key consideration |
|---|---|---|---|---|
| Estrogen-only | Women who've had a hysterectomy (no uterus) | No — estrogen alone | No monthly bleed expected | Not usually appropriate if you still have a uterus |
| Combined cyclical (sequential) | Women with a uterus who are perimenopausal or still having periods | Yes — progestogen for part of each month | A regular, scheduled monthly bleed | Often a sensible step during perimenopause |
| Combined continuous | Women with a uterus who are postmenopausal | Yes — progestogen every day | Aims to be bleed-free (early spotting is common) | Usually started once you're past your final period |
How clinicians choose between them
Beyond the uterus question, the right regimen depends on where you are in the menopause transition, whether you'd prefer a monthly bleed or none, your personal and family medical history, and the form that suits you — pills, patches, or gels. Some women start on cyclical HRT during perimenopause and later switch to continuous once they're clearly postmenopausal. There's no single "best" version; it's a fit between your body, your stage, and your preferences.
One more distinction worth knowing: low-dose vaginal estrogen used only for local symptoms like dryness works differently from the whole-body (systemic) HRT described here, and the usual progestogen rules may not apply in the same way. If that's your main concern, flag it specifically so it can be considered on its own terms.
Talk to your clinician
Whether estrogen-only or combined HRT — and if combined, cyclical or continuous — is right for you is a personal decision that depends on your health history and goals. Use this guide to ask better questions, then talk to your clinician or a menopause-informed prescriber about the option that fits you best. Never start, stop, or change a hormone therapy on your own.