Fig. 3.

Pattern of the E:P ratio (a) and the selected call parameters, i.e. call duration (b), number of inhales (c), number of exhales (d), inhales per exhales ratio (e), inhale duration (f), exhale duration (g), number of exhales per second (h), exhale interval (i), fundamental frequency of inhales (j), exhale peak frequency (k), exhale DFB (l) and DFA1–3 of exhales (m–o) for all five females (median, first and third quartile) during the course of the ovarian cycle. The shaded area indicates the fertile phase