Distinguishing features of endometrial pathology after exposure to the progesterone receptor modulator mifepristone.

There is growing interest in the use of progesterone receptor modulators such as mifepristone for treatment of gynecologic and other conditions, but interest in progesterone receptor modulators is dampened by the effects of the agents on the endometrium. In this study, we examined the endometria of women exposed to mifepristone for treatment of leiomyomas in doses of 2.5 and 5 mg and compared them to unexposed endometria.

Open-label study of ultra low-dose mifepristone for the treatment of uterine leiomyomata.

Objective: To assess the effect of ultra low-dose mifepristone on uterine size, pain, bleeding and quality of life among women with symptomatic leiomyomata.

Study Design: Open-label cohort study of 2.5mg mifepristone orally among adult women with at least moderately severe symptoms related to leiomyomata and total uterine volume of greater than 160 cm(3), or at least one myoma of greater than 2.