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Updated: Aug 29, 2026

An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause
Published on: August 13, 2019
Hormone replacement therapy: what is the evidence today?
B Uebelhart1, D Frey, D Uebelhart
1Division of Bone Disease, Department of Geriatrics, University Hospital, 1211, Geneva 14, Switzerland. brigitte.uebelhart@hcuge.ch
Insights
Long-term hormone replacement therapy (HRT) prevents fractures but increases risks for breast cancer, blood clots, and strokes. HRT is not recommended for cardiovascular prevention or cognitive health.
Area of Science:
- Reproductive Endocrinology
- Gerontology
- Cardiovascular Medicine
Background:
- Hormone replacement therapy (HRT) has been used for menopausal symptoms.
- Recent studies have re-evaluated the risks and benefits of long-term HRT.
Purpose of the Study:
- To summarize the current evidence on the long-term effects of HRT.
- To evaluate HRT's impact on fracture prevention, cardiovascular disease, cancer incidence, and cognitive function.
Main Methods:
- Review of recent scientific studies and clinical trial data.
- Analysis of HRT's effects on bone health, cardiovascular outcomes, cancer rates, and neurological functions.
Main Results:
- HRT effectively prevents fractures.
- HRT does not improve established coronary artery disease.
- HRT is associated with increased breast cancer and venous thrombosis, but decreased colorectal cancer.
- HRT increases the risk of pulmonary embolisms and strokes.
- HRT does not improve cognitive function or prevent dementia.
Conclusions:
- HRT should not be recommended for primary or secondary prevention of cardiovascular diseases.
- HRT is not beneficial for cognitive health.
- HRT remains useful for managing acute estrogen deficiency symptoms in recently menopausal patients.
- Long-term HRT is not recommended due to increased risks.
Abstract:
Based on the most recent studies, it clearly appears that long-term hormone replacement therapy (HRT) prevents fractures but does not improve established coronary artery disease. In addition, HRT leads to a small increase in breast cancer incidence and to a decrease in colorectal cancer incidence. HRT increases the incidence of venous thrombosis, pulmonary embolisms and strokes. As a consequence, HRT can no longer be recommended for primary or secondary prevention of cardiovascular diseases. In addition, it was also demonstrated that HRT was not able to improve cognitive functions and prevent dementia. Therefore regarding daily clinical practice, HRT certainly remains useful to control the symptoms of oestrogen deficiency in recently menopausal patients, but it should definitively no longer be recommended for long-term treatment.
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