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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Am J Obstet Gynecol. 2013 Oct 7;210(2):128.e1–128.e6. doi: 10.1016/j.ajog.2013.10.008

Figure 2.

Figure 2

Relationship between median 17-OHPC concentration from each quartile (Q1-Q4) of 17-OPHC concentrations and the rate of spontaneous preterm birth for each of those quartiles.