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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: Horm Behav. 2010 Dec 28;59(2):227–235. doi: 10.1016/j.yhbeh.2010.12.009

Figure 1.

Figure 1

Plasma progesterone levels as a function of study phase: (1) follicular phase when placebo progesterone was administered, (2) PROG (progesterone) phase when progesterone (150 mg B.I.D) was administered during the follicular phase, and (3) luteal phase when placebo progesterone was administered. Bars represent the mean + 1 SEM. * Indicates a significant difference from the follicular phase (p ≤ 0.01).