Timing matters: could your menstrual cycle change your breast cancer treatment?
NCT ID NCT05878314
First seen Feb 12, 2026 · Last updated May 13, 2026 · Updated 16 times
Summary
This study looks at whether the phase of a woman's menstrual cycle affects a key cancer growth marker called Ki67 in early-stage, hormone-positive breast cancer. Researchers will also see if adding a genetic test (PAM50) helps doctors make better treatment decisions. About 504 women will provide tissue and blood samples, but no experimental treatment is given—only standard care.
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Study contacts
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
Locations
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Department of Women's Health
RECRUITINGTübingen, 72076, Germany
Contact Phone: •••-•••-•••• Email: •••••@•••••
Conditions
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