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. 2008 Oct 8;5(1):12–15. doi: 10.1098/rsbl.2008.0507

Figure 1.

Figure 1

Correlation of high- versus low-fertility differences in voice pitch and proximity to ovulation in the high-fertility recording session, rpartial=0.33, p=0.006, controlling for proximity to menstrual onset in the low-fertility session and session order. This plot shows that fertile phase increases in pitch were greater for women whose voices were recorded closer to the day of ovulation within the fertile window.