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Supported by a grant from the Center for Research, Education, and Quality, Pediatrix Medical Group, Mednax Inc , Sunrise, FL.
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Cite this article as: Combs CA, Garite T, Maurel K, et al. 17-hydroxyprogesterone caproate for twin pregnancy: a double-blind, randomized clinical trial. Am J Obstet Gynecol 2011;204:221.e1-8.