Estrogen Type Decoder

What the Estrogen Type Decoder does

The Estrogen Type Decoder is a four-question quiz that suggests which form of estrogen tends to fit a given situation: local vaginal estrogen, transdermal estrogen (patch, gel, or cream), or oral estrogen. It is a rule-based tool, not a model, algorithm, or dataset. It asks four yes/no questions and runs your answers through a fixed set of if/then rules to land on one suggestion.

The four questions cover a history of blood clots, stroke, or strong family clotting history; whether you still have a uterus; whether your symptoms are vaginal only (dryness, painful sex, urinary symptoms); and whether you have sensitive skin or react to adhesives. From those answers it names one estrogen form, explains in a sentence or two why that form is often chosen, and usually adds a short caution to raise with a prescriber.

Because it works from four categorical answers, the same answers always produce the same result. Nothing you enter is saved, scored numerically, or sent anywhere. The output is a starting point for a conversation, not a decision.

How to read your result

The rules run in a fixed priority order, so the first condition you meet decides the answer. If you say your symptoms are vaginal only, it suggests local vaginal estrogen (a low-dose cream, ring, or tablet) regardless of your other answers, because systemic exposure from local estrogen is minimal. If your symptoms are not vaginal-only but you report any clotting history, it points to transdermal estrogen, which bypasses first-pass liver metabolism and carries lower clot risk than oral. If neither applies but you have sensitive skin or adhesive reactions, it suggests oral estrogen. Everyone else is shown transdermal as the default starting form, which the tool describes as patches typically changed twice a week.

The uterus question is different from the others: it never changes which estrogen form you are shown. It only adds a reminder that if you still have a uterus and are not using vaginal-only estrogen, you typically need progesterone alongside estrogen to protect the uterine lining. So answering it does not steer the form suggestion at all.

Treat the result as a talking point, not an instruction. It names a delivery form, not a dose, a brand, or a decision that HRT is right for you. The sensible next step is to bring the suggested form and any caution it shows to a licensed prescribing clinician who knows your full history. The page also links out so you can compare providers or browse brands, but those links are navigational and are not filtered by the form the tool suggested.

What the result is based on

Every result is computed from four yes/no answers passed through fixed rules written directly into the page. There is no account, no data collection, no statistical model, and no scoring beyond the plain if/then order: vaginal-only first, then clotting history, then skin sensitivity, then a transdermal default.

The reasoning the rules encode reflects common prescribing patterns rather than a calculation about you specifically: transdermal estrogen's lower clot risk compared with oral, local vaginal estrogen for genitourinary symptoms, and progesterone to oppose estrogen's effect on the uterine lining. The tool applies these as blanket rules and does not weigh dose, age, time since menopause, other medications, or lab results.

What it cannot tell you

• It never asks your age, time since menopause, or symptom severity, all of which a clinician weighs when choosing a form and a dose.
• The uterus question changes only whether it reminds you about progesterone; it never changes the estrogen form suggested.
• It suggests a delivery form only, not a dose, a specific product, or whether starting HRT is appropriate for you at all.
• The vaginal-only answer overrides everything else, so if you have both vaginal and whole-body symptoms (hot flashes, sleep, mood), answering yes hides the systemic options.
• It cannot account for contraindications beyond clotting history, such as breast cancer history, liver disease, unexplained bleeding, or drug interactions.
• Family and personal clotting history is collapsed into a single yes/no, so it cannot gauge how strong or relevant that history actually is.