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Table 3 Cross-classified relative frequency distributions (%) of six weaning-to-first-mating interval (WMI) groups in parity 1 and subsequent paritiesa

From: Recurrence patterns and lifetime performance of parity 1 sows in breeding herds with different weaning-to-first-mating intervals

WMI groups in parity 1 (days) Weaning-to-first-mating interval in subsequent parities (days)
0–3 4 5 6 7–20 21 or more
Percentages of sows (%)
Parity 2
0–3 21.4 45.5 19.3 2.9 8.1 2.8
4 9.1 60.5 19.3 2.7 6.3 2.1
5 3.9 32.2 48.9 5.6 6.7 2.7
6 3.0 25.8 46.5 11.3 9.5 3.9
7–20 5.1 31.5 36.2 8.4 14.6 4.2
21 or more 4.2 28.6 38.4 8.0 11.5 9.3
Parity 3
0–3 24.0 43.3 17.1 2.9 10.3 2.4
4 12.0 60.4 16.8 2.1 6.7 2.0
5 5.3 38.1 43.7 4.3 6.3 2.3
6 4.2 30.6 44.4 9.2 8.4 3.2
7–20 6.0 33.7 35.9 7.5 13.1 3.8
21 or more 4.9 29.4 36.6 8.6 12.0 8.5
Parity 4
0–3 22.0 46.2 17.7 2.5 9.2 2.4
4 11.7 60.4 17.6 2.2 6.3 1.8
5 6.1 40.2 40.9 4.1 6.3 2.4
6 4.6 32.0 44.9 7.5 8.0 3.0
7–20 7.1 37.9 33.9 6.9 11.0 3.2
21 or more 6.5 35.5 36.0 6.9 9.9 5.2
Parity 5
0–3 23.3 46.0 17.0 2.5 9.1 2.1
4 13.8 59.0 16.3 2.2 6.7 2.0
5 7.5 42.9 37.9 3.8 5.8 2.1
6 5.7 36.9 40.7 7.4 6.6 2.7
7–20 7.7 40.3 33.9 5.5 10.1 2.5
21 or more 7.2 37.2 35.9 6.9 8.3 4.5
Parity 6 or higher
0–3 22.7 46.9 19.0 2.4 7.2 1.8
4 13.4 59.1 18.4 2.0 5.4 1.7
5 7.9 42.9 38.8 3.8 4.9 1.7
6 6.0 35.1 42.7 7.2 6.8 2.2
7–20 8.4 39.1 34.9 5.9 9.4 2.3
21 or more 8.0 37.5 36.2 6.5 8.1 3.7
  1. aFrequency within a row totals 100%