2001 Breeding Herd Summary- Canada
Measurement	Mean	Mean to Mean+1Std	>Mean +1 Std
BREEDING PERFORMANCE
Repeat Services, %	11.6	10.1	6.8
Multiple Matings, %	85.6	87.1	88.3
Entry-to-first-service interval, days	28.1	29.4	32.7
Sows bred by seven days, %	86.7	88.0	90.7
Weaning-to-first-service interval	7.3	6.9	6.1
Average nonproductive days	66	58	46
FARROWING PERFORMANCE
Average gestation length	115	115	115
Average parity of farrowed sows	3.7	3.8	3.7
Farrowing interval	149	147	144
Farrowing rate, %	74.9	77.4	83.4
Average total pigs per litter	11.5	11.7	12.2
Average pigs born alive/ litter	10.5	10.7	11.2
Average stillborn pigs	0.8	0.8	0.8
Average mummies per litter	0.2	0.2	0.2
Percent <7 bornalive	9.7	8.7	6.6
PWM for farrowed and weaned	12.1	11.2	9.1
Litters per female per year	2.2	2.3	2.4
Litters per mated female per year	2.3	2.4	2.5
Old litters/mated females/year	2.2	2.2	2.4
WEANING PERFORMANCE
Pigs weaned per litter weaned	9.2	9.4	10.2
Average age at weaning	20.8	20.5	20.4
Pigs weaned per sow	9.3	9.5	10.2
Pigs weaned/ mated female/ year	21.5	22.7	25.3
Old pigs wnd/ mated female/ year	20.5	21.8	24.7
Pigs weaned/ female/ year	20.6	21.7	24.2
Pigs weaned/ lifetime	39.3	42.1	44.3
POPULATION
Average female inventory (AFI)	431	466	605
Average gilt pool inventory	21	26	23
Average parity	2.9	2.9	2.8
Replacement rate, %	52	50	47
Culling rate, %	37	36	36
Death rate, %	5.0	4.8	4.5
Average parity of culled sows	4.6	4.8	4.8
# Farms Included=455    Mean (based on Pigs Weaned/ Mated Female/ Year) = 21.5      STDEVP=2.65