Table I.
Numbers of menstrual cycles per year in control and testosterone-treated macaques after 3 years of age.
| Animal | Third year |
Fourth year |
Fifth year |
||||
|---|---|---|---|---|---|---|---|
| Number menstrual periods | Number ovulatory cycles | Number menstrual periods | Number ovulatory cycles | Number menstrual periods | Number ovulatory cycles | ||
| Control | 1 | 2 | 0 | 3 | 0 | 4 | 0 |
| 2 | 6 | 0 | 7 | 5 | 9 | 4 | |
| 3 | 0 | 0 | 8 | 0 | 6 | 4 | |
| 4 | 2 | 0 | 8 | 1 | 7 | 3 | |
| 5 | 4 | 0 | 4 | 0 | 7 | 3 | |
| 6 | 6 | 1 | 5 | 0 | 9 | 7 | |
| Mean | 3.3 ± 1.0 | 0.2 ± 0.2 | 5.8 ± 0.9 | 1 ± 0.8 | 7.0 ± 0.8 | 3.5 ± 0.9 | |
| Testosterone-treated | 7 | 7 | 0 | 8 | 1 | 9 | 3 |
| 8 | 6 | 0 | 7 | 3 | 6 | 4 | |
| 9 | 5 | 0 | 5 | 0 | 4 | 0 | |
| 10 | 4 | 0 | 7 | 1 | 9 | 7 | |
| 11 | 3 | 0 | 7 | 3 | 10 | 5 | |
| 12 | 3 | 0 | 6 | 0 | 8 | 2 | |
| Mean | 4.7 ± 0.7 | 0 | 6.7 ± 0.4 | 1.3 ± 0.6 | 7.7 ± 0.9 | 3.5 ± 1.0 | |
Menstrual periods are presented as recorded from September to May, as rhesus monkeys may be acyclic or anovulatory in the summer months. Therefore, number of menstrual periods ≥9 is considered normal for adults. Data are presented as mean ± SEM. There were no significant differences between groups for any measure.