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. Author manuscript; available in PMC: 2014 Sep 25.
Published in final edited form as: J Affect Disord. 2013 May 21;150(3):1103–1108. doi: 10.1016/j.jad.2013.04.046

Figure 2. Changes in circadian phase and phase angle from 3rd Trimester to 6 weeks Postpartum.

Figure 2

In Fig. 2a, triangles represent the participants DLMO phase at 3rd Trimester (top) and 6 weeks postpartum (bottom). Most women phase delayed across the perinatal period. In Fig. 2b, circles represent the participants’ phase angles at 3rd trimester (top) and 6 weeks postpartum (bottom). Most women had a decrease in phase angle across the perinatal period, indicating they were going to sleep at an earlier circadian time, i.e., closer to the onset of nocturnal melatonin secretion.