TABLE 1.

Duration of the ovarian cycle based on daily vaginal smears in the cynomolgus monkey.

Duration (days)	Range (days)	No. of cycles	Housing	Reference
30.4 ± 4.7	16–69	926	Single, indoor	Present work
30.3 ±3.9	22–71	200	Pair, outdoor/indoor	Present work
29.2	22–37	647	Single, indoor	Shaikh, Naqvi, and Shaikh (1978)
30.2 ± 1.4	29–35	6	NA	Butterstein et al. (1997)
35.9 ± 1.6	26–45	20	Single, indoor	Attia (1998)
30.3	NA	395	5–6 female and 1 male, outdoor	Adams, Kaplan, and Koritnik (1985)

Data represent M ± SD. NA = not available.