How do scientists determine the health outcomes associated with hormone use?

In order to study the benefits and risks of hormone use, researchers commonly conduct two types of human studies: clinical trials and observational studies. In clinical trials, the participants are given either hormones or placebos (look-alike pills that do not contain any drug) to determine the effect of the hormones on various conditions and diseases. In observational studies, there is no intervention by the investigators; they compare the health status of women taking hormones to women not taking the hormones. The strongest evidence for proving an association between menopausal hormones and a disease or condition comes from clinical trials.

Questions and Answers About Menopausal Hormone Use

• What is menopause?

• What are menopausal hormones and why are they used?

• How do scientists determine the health outcomes associated with hormone use?

• Do the benefits of hormone use after menopause outweigh the risks?

• What are the effects of hormone use on the uterus?

• How does menopausal hormone use affect breast cancer risk and survival?

• How does menopausal hormone use affect the risk of ovarian cancer?

• What are the effects of menopausal hormones on heart disease?

• What are the effects of menopausal hormones on bone health?

• What are the effects of postmenopausal hormone use on quality of life and cognitive functions, specifically memory and learning?

• Are there other benefits or risks associated with menopausal hormone use?

• What are the risks of menopausal hormones for women who have a history of cancer?

• Does the route of administration of hormones make a difference?

• Are there any alternatives for women who choose not to take menopausal hormones?

• What research still needs to be done?