Figure 4.

Parameters of the estrous rhythm of body temperature. Values shown are means ± SEM of three parameters of the estrous rhythm of body temperature of 8 cows (robustness, mean level, and range of excursion), as computed for measurements conducted at dawn (dark bars) and dusk (clear bars) during the winter and summer. For this type of data (3 estrous cycles with daily measurements), a Q_P value of 60 corresponds to a perfectly rhythmic process.