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. Author manuscript; available in PMC: 2010 May 1.
Published in final edited form as: Eur J Obstet Gynecol Reprod Biol. 2009 Mar 19;144(Suppl 1):S96–100. doi: 10.1016/j.ejogrb.2009.02.023

Figure 4.

Figure 4

Contour plot of the ratio of power in higher-frequency (0.5–1 Hz) to lower-frequency (0.25–0.5 Hz) for MMG data from 38 weeks 1 day until 48 hours before the subject went into active labor. The frequency content of the MMG bursts are color coded and the contour plot is overlaid on a 151 channel sensor map to show the spatial distribution.