Table 1. Fertility AI-outcomes and seminal plasma total antioxidant capacity (SP-TAC, mmol/L) of the liquid semen of 18 boars (2,500 × 10⁶ sperm/dose).

Boars	SP-TAC (mean ± SEM)	Sows inseminated (n°)	Farrowing Rate (%)	Total Piglets Born (mean ± SEM)	Fertility Indexa
1	0.91 ± 0.04	225	84.00 ± 2.68	13.50 ± 0.28	11.34
2	0.90 ± 0.01	382	86.65 ± 1.70	12.98 ± 0.16	11.25
3	0.77 ± 0.06	456	84.43 ± 1.88	12.79 ± 0.16	10.80
4	0.72 ± 0.01	801	86.64 ± 1.29	13.92 ± 0.12	12.06
5	0.71 ± 0.01	294	85.71 ± 2.25	13.91 ± 0.24	11.92
6	0.67 ± 0.04	546	89.01 ± 1.47	13.96 ± 0.14	12.43
7	0.66 ± 0.05	163	90.18 ± 1.99	14.06 ± 0.27	12.68
8	0.66 ± 0.02	350	90.86 ± 2.75	13.87 ± 0.15	12.60
9	0.66 ± 0.02	487	91.79 ± 1.50	13.74 ± 0.16	12.61
10	0.61 ± 0.03	579	87.91 ± 1.57	12.94 ± 0.15	11.38
11	0.52 ± 0.04	111	88.29 ± 3.64	12.44 ± 0.32	10.98
12	0.52 ± 0.02	107	84.11 ± 4.53	12.64 ± 0.30	10.64
13	0.51 ± 0.02	140	87.86 ± 3.45	13.27 ± 0.29	11.66
14	0.46 ± 0.01	182	83.52 ± 3.00	12.48 ± 0.31	10.42
15	0.44 ± 0.06	131	83.21 ± 2.80	11.80 ± 0.29	9.82
16	0.44 ± 0.01	191	83.25 ± 3.47	13.13 ± 0.22	10.93
17	0.34 ± 0.02	189	83.07 ± 2.78	13.21 ± 0.24	10.97
18	0.29 ± 0.02	212	82.60 ± 3.19	12.06 ± 0.36	10.05

Boars were hierarchically grouped as high (1-10) and low (11-18) SP-TAC values.

^aThe total number of piglets born as a proportion of the number of sows inseminated by each boar.