Table 3 Concentrations and characteristics of FSH, LH, and estradiol-17b after introduction of rams to anestrous ewes primed for 6 days with intravaginal sponges containing 60 mg of MAP. (Abbreviations as in Table 2.) (Experiment 2).
E-O | NE-O | NE-NO | P | |
|---|---|---|---|---|
LH surge | 5/5 | 5/5 | 0/4 | < 0.001 |
LH surge concentration (μg/L) | 21.3 ± 5.6 | 11.5 ± 1.9 | 0.07 | |
Time to LH surge (h) | 51.6 ± 8.4 | 75.6 ± 7.9 | 0.07 | |
Time to ovulation (h) | 67.2 ± 6.1 | 94.0 ± 8.9 | < 0.1 | |
Mean FSH concentration (μg/L) | 3.1 ± 0.1 | 2.7 ± 0.1 | 2.5 ± 0.4 | < 0.1 |
Maximum FSH concentration (μg/L) | 5.1 ± 0.4a | 4.3 ± 0.1a | 3.4 ± 0.5b | < 0.1 |
Mean estradiol-17β levels (pmol/L) | 13.4 ± 1.2 | 13.3 ± 2.1 | 10.5 ± 1.3 | < 0.1 |
Maximum estradiol-17β levels (pmol/L) | 23.8 ± 3.3 | 15.8 ± 1.6 | 17.5 ± 1.9 | 0.09 |