Semen used | No. of mares | 1st cycle pregnancy rate | Seasonal pregnancy rate | Pregnancy loss rate | Foaling rate | |||||
---|---|---|---|---|---|---|---|---|---|---|
Fresh | Cooled | Fresh | Cooled | Fresh | Cooled | Fresh | Cooled | Fresh | Cooled | |
Mare age | ||||||||||
Younger (2–10) | 625 | 271 | 57.4a | 46.7b | 87.0c | 70.9d | 4.6 | 4.1 | 82.4e | 66.8f |
Mature (11–15) | 416 | 193 | 55.5a | 38.3b | 84.1c | 64.8d | 5.5 | 4.2 | 78.6e | 60.6f |
Older (16–24) | 216 | 91 | 47.7a | 37.4a | 77.3c | 59.3d | 5.6 | 3.3 | 71.8e | 56.0f |
Stud | ||||||||||
A | 763 | 389 | 51.4a | 44.0b | 83.6c | 69.4d | 5.9 | 3.3 | 77.7e | 66.1f |
B | 158 | 54 | 58.2a | 20.4b | 87.3c | 51.9d | 3.2 | 3.7 | 84.2e | 48.2f |
C | 131 | 46 | 58.0a | 50.0a | 87.0c | 76.1c | 3.0 | 6.5 | 84.0e | 69.6e |
D | 205 | 58 | 64.9a | 44.8b | 83.4c | 60.3d | 4.9 | 6.9 | 78.5e | 53.5f |
E | 0 | 8 | – | 37.5 | – | 37.5 | – | 0.0 | – | 37.5 |
Year | ||||||||||
2006 | 137 | 75 | 54.0a | 44.0a | 81.8c | 65.3d | 4.4 | 5.3 | 77.4e | 60.0f |
2007 | 243 | 81 | 47.3a | 46.9a | 84.0c | 69.1d | 4.1 | 2.5 | 79.8e | 66.7f |
2008 | 368 | 103 | 57.9a | 28.2b | 84.0c | 57.3d | 4.6 | 1.6 | 79.4e | 55.3f |
2009 | 297 | 158 | 58.9a | 51.9a | 86.5c | 76.6d | 4.4 | 7.0 | 82.2e | 69.6f |
2010 | 212 | 138 | 54.7a | 37.7b | 84.4c | 62.3d | 8.5 | 2.2 | 75.9e | 60.1f |
Overall | 1257 | 555 | 55.1a | 42.2b | 84.4c | 66.9d | 5.1 | 4.0 | 79.3e | 62.9f |