Table 1.
Change of concentrations of progesterone and estradiol-17β, lactation length, and number of pigs weaned before and after porcine epidemic diarrhea (PED) outbreak
| Month of weaning | Number | Progesterone concentration | Estradiol-17β concentration | Lactation length, day | Number of pigs weaned |
|---|---|---|---|---|---|
| Jul. 13 | 20 | 0.33 ± 0.03 | 0.53 ± 0.10b | 27.9 ± 0.2 | 7.8 ± 0.3a |
| Aug. 13 | 19 | 0.29 ± 0.03 | 0.85 ± 0.08ab | 26.7 ± 0.6 | 7.5 ± 0.1a |
| Sep. 13 | 20 | 0.29 ± 0.06 | 0.99 ± 0.11ab | 28.2 ± 0.4 | 6.9 ± 0.3ab |
| Oct. 13 | 20 | 0.23 ± 0.04 | 0.79 ± 0.13b | 27.8 ± 0.5 | 7.4 ± 0.3a |
| Nov. 13 | 20 | 1.01 ± 0.54 | 3.48 ± 0.99a | 27.7 ± 0.5 | 6.7 ± 0.3ab |
| Dec. 13 | 20 | 1.40 ± 0.80 | 4.26 ± 1.35a | 26.4 ± 0.6 | 5.8 ± 0.4ab |
| Jan. 14 (PED outbreak) | 20 | 1.99 ± 0.95 | 3.16 ± 0.93a | 27.0 ± 0.9 | 3.3 ± 0.4c |
| Feb. 14 | 20 | 2.23 ± 1.19 | 2.34 ± 0.63ab | 26.8 ± 0.8 | 5.2 ± 0.7b |
| Mar. 14 | 20 | 0.45 ± 0.05 | 1.03 ± 0.26ab | 25.7 ± 0.8 | 8.2 ± 0.5a |
| Apr. 14 | 20 | 0.47 ± 0.16 | 2.27 ± 0.27ab | 27.4 ± 0.5 | 7.7 ± 0.3a |
| May 14 | 20 | 0.21 ± 0.03 | 1.22 ± 0.15ab | 29.0 ± 1.1 | 7.4 ± 0.4a |
| Jun. 14 | 20 | 0.47 ± 0.11 | 2.11 ± 0.26ab | 27.2 ± 0.4 | 7.9 ± 0.4a |
| Jul. 14 | 20 | 1.14 ± 0.19 | 3.48 ± 0.34a | 27.4 ± 0.7 | 8.1 ± 0.3a |
Values within a column without a common letter (a–c) were significantly different (P < 0.05)