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. 2017 Feb 17;21(4):323–328. doi: 10.1055/s-0037-1598601

Fig. 4.

Fig. 4

Variation in hearing thresholds throughout the menstrual cycle phases for the group that does not use oral contraceptives. We observed the optimal hearing thresholds in the late follicular phase, which coincides with an increase in estrogen concentration, and observed increased thresholds in the late luteal phase and in the early follicular phase (higher progesterone concentration).