Postmenopausal Tibolone Therapy: Biologic Principles and Applied Clinical Practice

Morris Notelovitz, MD, PhD, MB, BCh, FACOG, FRCOG

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In This Article

Clinical Practice: Endometrial Surveillance

Tibolone therapy is associated with a slight but clinically insignificant increase in endometrial thickness when monitored by serial transvaginal ultrasound (TVUS) measurements over 1 year. Values for TVUS endometrial thickness in women treated with tibolone (2.5 mg daily) are similar to that following CCHT (2 mg E2 and 1mg NETA; CEE 0.625 mg and 2 mg MPA).

The TVUS endometrial thickness values in these studies peak at 1 year and do not change appreciably for the following 2 years of observation.[47] Some studies reported an association between tibolone usage and endometrial polyps (< 1%). The polyps were mostly inactive and benign.[47] Tibolone does not increase the growth of uterine myomas.

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