Table 1

Means of all vocal measurements in low- and high-fertility sessions. (s.d. in parentheses; analyses controlled for days-to-menstrual-onset, estimated days-to-ovulation, and session order. *p=0.02.)

sessions

recordingacoustic dimensionslow fertilityhigh fertility
spoken sentenceF0 (Hz)206 (26.0)211 (28.0)*
F0 s.d. (Hz)27.0 (12.7)28.1 (13.0)
mean syllabic duration (ms)169 (29.0)171 (24.1)
sustained vowelavg. jitter (%)0.49 (0.40)0.52 (0.62)
avg. shimmer (%)3.70 (2.45)3.90 (2.58)
harmonic-to-noise ratio (dB)18.09 (4.5)17.74 (4.2)
F0 (Hz)209 (26.5)206 (26.5)
mono vowelsDf (Hz)1138 (48.9)1134 (50.4)
F0 (Hz)212 (21.6)213 (23.7)