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Clinical Trial Summary

The goal of this randomized-controlled trial is to compare the effect of rhythmic estrogen treatment to continuous estrogen treatment on bone turnover in healthy postmenopausal women. The main question it aims to answer are: • Does rhythmic estrogen lead to increased bone formation in healthy postmenopausal women, compared to continuous estrogen? Participants will receive one of the following treatments for a duration of 16 weeks: - Rhythmic estradiol: Alternating 4-week cycles consisting of transdermal 17-β-estradiol 25μg/24hrs for two weeks, followed by two weeks of transdermal 17-β-estradiol 50μg/24hrs. Estradiol therapy will be combined with continuous oral micronized progesterone 100mg once daily. - Low-dose continuous estradiol: Continuous transdermal 17-β-estradiol 25μg/24hrs, combined with continuous oral micronized progesterone 100mg daily once daily. - Standard-dose continuous estradiol: Continuous transdermal 17-β-estradiol 50μg/24hrs, combined with continuous oral micronized progesterone 100mg daily once daily. If there is a comparison group: Researchers will compare rhythmic estradiol to continuous estradiol to see if rhythmic estradiol improves bone formation in postmenopausal women.


Clinical Trial Description

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Study Design


Related Conditions & MeSH terms


NCT number NCT05903820
Study type Interventional
Source Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)
Contact M
Status Recruiting
Phase Phase 4
Start date July 19, 2023
Completion date September 2024

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