Could antiprogesterones be used as alternative cervical ripening agents?

Johnson, N; Bryce, F C · Am J Obstet Gynecol · 1990

case_series · Level IV

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Abstract

We measured the effect of a progesterone antagonist on the pregnant cervix with a custom-built cervicometer. The change in cervical diameter was studied in 11 pregnant patients after oral administration of 600 mg of RU-486. In all cases RU-486 ripened the cervix (p = 0.0007). The average increase in diameter was 13% (95% confidence limits, 10% to 16%).

Medical subject headings