Oestrus Cycle Length (days)

The number of days from the start of one oestrus to the start of the next. The day of the start of oestrus is counted as 0 (Esslemont et al., 1985; Berger et al., 1989). The oestrus cyclce comprises all events related to reproduction occurring between two periods of sexual activity (Mukasa-Mugerwa, 1989).