RU 486, a pill that counteracts the actions of the pregnancy hormone progesterone, can be used to terminate early pregnancies. It has been the subject of great controversy in the United States and in France (and Europe). See pages 1319 and 1351. [Photograph of RU 486 by Peter Krough. Photograph of a demonstration in front of the U.S. Supreme Court Building by Arthur Grace/Sygma]

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