The Women's Health Initiative - How One Study Changed HRT for Women

In 2002, the results of the Women’s Health Initiative (WHI) changed the conversation around hormone replacement therapy almost overnight. Millions of women stopped taking HRT, prescriptions plummeted, and fear around estrogen, breast cancer and heart disease shaped women’s healthcare for the next two decades.

But what did the WHI actually study—and what did it really find?

In this short episode of Meet Your Body, Jessica breaks down the history of the landmark Women’s Health Initiative, why the hormone therapy trial was stopped early, and how its findings were interpreted and communicated to women.

You’ll learn:

What type of estrogen and progestin were actually used in the WHI

Why the age of the women in the study matters

What researchers found about breast cancer, heart disease, blood clots and fractures

The important differences between the estrogen-only and estrogen-plus-progestin trials

Why absolute risk and relative risk told very different stories

How the WHI differs from the way many women use hormone therapy today

What decades of follow-up research have taught us about HRT, timing and individual risk

The WHI wasn’t simply a “bad study,” and its findings shouldn’t be ignored. But its results also shouldn’t be applied to every woman, every hormone and every form of HRT.