Table 1.
Effect of timing and depth of insemination within cervico-uterine tract on pregnancy and lambing rates of Bharat Merino ewes inseminated with frozen-thawed semen
| Timing of insemination after onset of estrus | Depth of insemination within cervico-uterine tract | Overall | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Full (uterine) | Mid (3 rdto last cervical fold) | Partial (os to 2 ndcervical fold) | ||||||||||
| n | Pregnancy rate (%) | Lambing rate (%) | n | Pregnancy rate (%) | Lambing rate (%) | n | Pregnancy rate (%) | Lambing rate (%) | n | Pregnancy rate (%) | Lambing rate (%) | |
| 14 & 22 h | 89 | 31.5 | 20.2 | 23 | 17.4 | 17.4 | 28 | 17.9 | 17.9 | 140 | 26.4 | 19.3 a |
| 10 h | 73 | 21.9 | 11.0 | 12 | 16.7 | 8.3 | 15 | 13.3 | 6.7 | 100 | 20 | 10 b |
| Overall | 162 | 27.2 | 16.0 | 35 | 17.1 | 14.3 | 43 | 16.3 | 14.0 | 240 | 23.3 | 15.4 |
Values with different superscripts in same column are significantly (P < 0.05) different.