Table 1 : The number of cows in which pregnancy was rescued and the number of cows in which
induced luteal tissue was successful in resulting in calving.
| Days of gestation at time of PGF2α treatment |
No. of maintained pregnancies (%)1,2 | No. of cows with induced luteal tissue (%)3,4 | No. of cows calving (%)5 |
| 30 to 40 days (mature cows) | 8/12 (67%) | 2/3 (67%) | 1/2 (50%) |
| Time from PGF2α to P4 (2 hours) | 2/3 | 1/2 | 1/1 |
| Time from PGF2α to P4 (6 hours) | 3/3 | 1/1 | 0/1 |
| Time from PGF2α to P4 (10 hours) | 2/3 | -- | -- |
| Time from PGF2α to P4 (12 hours) | 1/2 | -- | -- |
| Time from PGF2α to P4 (18 hours) | 0/1 | -- | -- |
| 80 to 90 days (mature cows) | 3/6 (50%) | 2/2 (100%) | 2/2 (100%) |
| Time from PGF2α to P4 (2 hours) | 2/3 | 2/2 | 2/2 |
| Time from PGF2α to P4 (6 hours) | 1/2 | -- | -- |
| Time from PGF2α to P4 (12 hours) | 0/2 | -- | -- |
| 30 to 40 days (heifers) | 7/7 (100%) | 6/7 (86%) | 5/6 (83%) |
| Time from PGF2α to P4 (2 hours) | 2/2 | 2/2 | 2/2 |
| Time from PGF2α to P4 (6 hours) | 2/2 | 1/2 | 1/1 |
| Time from PGF2α to P4 (12 hours) | 3/3 | 3/3 | 2/3 |
| Total | 18/25 (72%) | 10/12 (83%) | 8/10 (80%) |
1 Only females that responded to PGF2α (<2 ng/ml P4 within 30 hours post- PGF2α) were included in this column.
2 Pregnancies were maintained for 7 days in the absence of a corpus luteum (CL).
3 Not all females in which pregnancy was maintained for 7 days were used for induction of luteal tissue.
4 Females included in this column that did not have induced luteal tissue aborted during the process of luteal
tissue induction.
5 Females in this group not calving aborted while pregnancy was maintained by induced luteal tissue.