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Menopause: evidence-based practice.

Jennifer Blake1

  • 1Department of Obstetrics and Gynecology, University of Toronto, Ontario, Canada. jennifer.blake@sw.ca

Best Practice & Research. Clinical Obstetrics & Gynaecology
|November 7, 2006
PubMed
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Menopause involves hormonal changes and symptoms. Hormone therapy is effective for symptom relief but carries risks like breast cancer, especially estrogen plus progestin. Women with a uterus need progestational agents.

Area of Science:

  • Reproductive Endocrinology
  • Menopause Transition
  • Women's Health

Background:

  • Menopause is a significant physiological transition marked by declining ovarian function, hormonal shifts (decreased estradiol and inhibin, increased follicle-stimulating hormone), and the cessation of menstruation.
  • The role of hormone therapy (HT) has evolved from broad preventive use to targeted symptom management, where it remains highly effective.
  • Understanding the risks and benefits of HT is crucial, particularly concerning breast cancer and endometrial health.

Purpose of the Study:

  • To review the current understanding of menopause as a physiological transition.
  • To evaluate the evolving role and efficacy of hormone therapy in managing menopausal symptoms.
  • To assess the evidence regarding the risks of hormone therapy, specifically breast cancer and endometrial hyperplasia/cancer.

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Main Methods:

  • Review of observational studies and randomized controlled trials (RCTs) on hormone therapy and menopause.
  • Analysis of data concerning breast cancer risk associated with different hormone therapy regimens (estrogen plus progestin vs. estrogen alone).
  • Evaluation of evidence on endometrial hyperplasia and cancer risk with unopposed estrogen and the necessity of progestational agents.

Main Results:

  • Estrogen plus progestin therapy is associated with an increased risk of breast cancer compared to estrogen alone.
  • Unopposed estrogen therapy significantly increases the risk of atypical endometrial hyperplasia or cancer, necessitating progestational agents for women with a uterus.
  • Recent findings suggest older participant age in the Women's Health Initiative (WHI) RCT may explain discrepancies with prior epidemiologic cardiovascular outcome studies.

Conclusions:

  • Hormone therapy remains the most effective intervention for menopausal symptom management but requires careful consideration of risks.
  • The choice of hormone therapy regimen and duration is critical, with specific attention to breast cancer and endometrial safety.
  • Lifestyle modifications are important for preventive health during menopause, and further research may clarify cardiovascular outcome discrepancies.