Table 3 Reproductive performance (in terms of weaning-to-first service interval, fertility and prolificacy) of lactating sows in the following cycle considering the different feed intake patterns

No. of sows

407

254

195

161

41

WFSI (days)¹

6.34^y

5.93^y

6.55^y

6.50^y

13.11^x

1.31

Farrowing rate (%)

91.0^a

89.8^a

89.6^a

92.6^a

75.0^b

–

Total born

17.4

17.7

17.4

19.9

16.3

0.92

Born alive

14.8

15.1

15.1

14.7

13.6

0.95

Stillborn

1.89

1.89

1.76

1.67

2.22

0.65

Mummified

0.68

0.59

0.58

0.53

0.51

0.24

%Stillborn + Mummified

14.2

13.0

12.9

12.1

15.4

4.15