Table 1.
Comparisons of ovulation rates/numbers of detected luteal structures, estrous cycle duration, and characteristics of follicular waves (penultimate and final wave of the estrous cycle studied; means±SEMs) among Control (hay-only diet) and lupin-fed groups
| Variables | Control (n=8) | Treatment 1 (n=8) | Treatment 2 (n=8) |
|---|---|---|---|
| Ovulation rate | 1.6±0.2 | 1.7±0.2 | 1.6±0.2 |
| Number of luteal structures at mid-cycle | 1.5±0.2 | 1.7±0.2 | 1.5±0.2 |
| Interovulatory interval (days) | 16.9±0.2 | 16.7±0.4 | 16.8±0.3 |
| Penultimate wave | |||
| Day of emergence* | 9.2±0.2 | 9.4±0.4 | 9.4±0.7 |
| Number of follicles | 2.1±0.4 | 2.7±0.4 | 1.7±0.3 |
| Number of ovulatory follicles | 0.12±0.12 | 0.25±0.25 | 0.29±0.18 |
| Percentage of ovulating follicles | 6.2±6.2 | 8.3±8.3 | 21.4±14.9 |
| Growth phase (days) | 2.0±0.5a | 1.8±0.4a | 3.8±0.5b |
| Growth rate (mm/day) | 1.6±0.2 | 1.7±0.1 | 1.1±0.2 |
| Static phase (days) | 2.3±0.6 | 2.2±0.4 | 2.2±0.7 |
| Regressing phase (days) | 2.8±0.4a | 1.4±0.1b | 1.9±0.4ab |
| Regression rate (mm/day) | 1.0±0.1 | 1.7±0.2 | 1.2±0.2 |
| Maximum follicle diameter (mm) | 6.2±0.6 | 5.9±0.9 | 6.5±0.3 |
| Ovulatory follicle diameter (mm) | 5.5±0.2a | 5.2±0.2a | 6.2±0.3b |
| Final wave | |||
| Day of emergence* | 12.4±0.5ab | 12.8±0.4a | 11.7±0.4b |
| Number of follicles | 2.2±0.5 | 2.9±0.5 | 2.6±0.3 |
| Number of ovulatory follicles | 1.5±0.2 | 1.5±0.3 | 1.4±0.3 |
| Percentage of ovulating follicles | 80.0±9.8 | 58.3±14.1 | 52.1±9.7 |
| Growth phase (days) | 2.1±0.4 | 1.8±0.3 | 2.2±0.3 |
| Growth rate (mm/day) | 1.3±0.1 | 1.6±0.1 | 1.4±0.1 |
| Static phase (days) | 2.7±0.5 | 2.3±0.4 | 2.0±0.2 |
| Maximum follicle diameter (mm) | 5.9±0.3 | 5.5±0.2 | 6.1±0.1 |
| Ovulatory follicle diameter (mm) | 6.1±0.3 | 4.9±0.7 | 5.9±0.9 |
| Interwave interval (days) | 4.2±0.4 | 4.4±0.2 | 3.4±0.4 |
Treatment 1: 500 g of lupin grain at 8:00 a.m. and Treatment 2: 250 g of lupin grain at 8:00 a.m. and 250 g at 6:00 p.m. from days 9 to 14
*
*Day 0=first ovulation of the interovulatory interval studied
Within rows, different letters denote significant differences (P<0.05) among groups.