Table 2.
Factors associated to pregnancy loss (PL) from days 30 to 60, day 60 to calving, and day 30 to calving in buffalo recipients.
| PL | |||||||
|---|---|---|---|---|---|---|---|
| N | Days 30–60 | OR (95% CI)* | 60 days–calving | OR (95% CI) | 30 days–calving | OR (95% CI) | |
| Season | |||||||
| Breeding season | 28 | 0.0A | Ref.# | 3.6A | Ref. | 3.6A | Ref. |
| Nonbreeding season | 47 | 12.8B | >999.90 (<0.01–∞) |
26.8B | 9.90 (1.20–81.80) |
36.2B | 15.30 (1.91–122.80) |
| Recipient parity | |||||||
| Heifer | 20 | 5.0 | Ref. | 5.3 | Ref. | 10.0 | Ref. |
| Cow | 54 | 9.3 | 1.93 (0.21–17.70) |
22.4 | 5.21 (0.62–43.52) |
29.6 | 3.79 (0.79–18.27) |
| Protocol | |||||||
| Ovsynch | 13 | 0.0 | Ref. | 7.7 | Ref. | 7.7 | Ref. |
| P4 + EB$ | 62 | 9.7 | >999.90 (<0.01–∞) |
19.6 | 2.93 (0.34–25.02) |
27.4 | 4.53 (0.55–37.58) |
| CL diameter | |||||||
| ≥14.5 mm | 45 | 4.4 | Ref. | 16.3 | Ref. | 20.0 | Ref. |
| <14.5 mm | 27 | 14.8 | 3.74 (0.64–21.97) |
21.7 | 1.43 (0.39–5.14) |
33.3 | 2.00 (0.68–5.91) |
| Asynchrony | |||||||
| 0 | 16 | 12.5 | Ref. | 28.6 | Ref. | 37.5 | Ref. |
| +1 | 52 | 5.8 | 0.43 (0.07–2.83) |
14.3 | 0.42 (0.10–1.71) |
19.2 | 0.40 (0.12–1.35) |
| Day of recipient estrous cycle | |||||||
| 7 | 30 | 6.7 | Ref. | 17.9 | Ref. | 23.3 | Ref. |
| 6 | 45 | 8.9 | 1.37 (0.23–7.97) |
17.1 | 0.95 (0.27–3.35) |
24.4 | 1.06 (0.36–3.14) |
| Embryo | |||||||
| Fresh | 49 | 4.1 | Ref. | 14.9 | Ref. | 18.4 | Ref. |
| Vitrified | 26 | 15.4 | 4.27 (0.73–25.12) |
22.7 | 1.68 (0.47–6.05) |
34.6 | 2.35 (0.79–6.96) |
| Day of embryo development | |||||||
| 5 | 26 | 3.9 | Ref. | 12.0 | Ref. | 15.4 | Ref. |
| 6 | 42 | 9.5 | 2.6 (0.28–24.93) |
21.1 | 2.0 (0.47–8.22) |
28.6 | 2.2 (0.63–7.74) |
| Embryo stage | |||||||
| Expanded blastocyst | 57 | 8.8 | – | 19.2 | – | 26.3 | – |
*
OR, odds ratio; CI, confidence interval.
#
Ref.: reference point odds ratio = 1.0.
$
P4 + EB: progesterone associated to estradiol plus eCG protocol.
∞ > 999.99.
A ≠ B (P ≤ 0.05).