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gestagen in Medicine

gestagen

(jĕstə-jən, -jĕn′)
n.
  1. A substance, such as a steroid hormone, that affects the uterus in a manner similar to progesterone.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.