1998 Breeding Herd Summary- CANADA
Measurement	Average	Median	Upper 10%	Lower 10%
BREEDING PERFORMANCE
Repeat services, %	10.7	9.7	5.2	17.2
Multiple Matings, %	80.1	85.9	99.4	55.4
Entry-to-service interval, day	25.7	24	12.5	39.4
Sows bred by seven days, %	89.3	89.8	95.2	83.3
Weaning-to-first-service interval	6.7	6.4	5.2	8.2
Average nonproductive days	61.2	60.3	36.5	85.9
FARROWING PERFORMANCE
Average gestation length	115	115	114	116
Average parity of farrowed sows	3.8	3.9	4.5	3.1
Farrowing interval	148	147	142	155
Farrowing rate, %	75.6	75.6	88.5	60.6
Average total pigs / litter	11.4	11.5	12.2	10.6
Average pig born alive / litter	10.6	10.6	11.3	9.8
Average stillborn pigs	0.7	0.7	0.5	1
Average mummies per litter	0.18	0.2	0	0.3
Percent <7 born alive	9.0	8.4	5.3	13.2
PWM for farrowed and weaned	12.1	12.1	7.8	16.3
Litters / female / year	2.25	2.27	2.4	2.1
Litters / mated female / year	2.31	2.32	2.45	2.16
Old litters / mated female / year	2.14	2.21	2.46	1.8
Litters / farrowing crate / year	12.6	11.6	19.5	8.8
WEANING PERFORMANCE
Pigs weaned per litter weaned	9.3	9.4	10.1	8.5
Average age at weaning	21.3	20.6	16.4	26.5
Adjusted 21-d litter weight (lb./ kg.)	133 / 60	138 / 63	151 / 69	119 / 54
Pigs weaned per sow	9.3	9.3	10	8.5
Pigs weaned / mated female / year	21.5	21.6	24.4	18.6
Old pigs wnd / mated female / year	20.3	20.4	24.1	17.0
Pigs weaned / female / year	20.9	21.1	23.6	18.0
Pigs weaned / lifetime	40	40	55	25
Pigs weaned / farrowing crate / year	119	110	81	180
POPULATION
Average female inventory (AFI)	427	302	993	97
AFI / farrowing crate	7.4	5.6	9.6	4.1
Average gilt pool inventory	17.6	10.4	42	2.7
Gilt pool: Female inventory, %	3.7	3.3	6.7	1.5
Sow: Boar Ratio	21	17.2	35	3.7
Average parity	2.98	3.0	3.8	2.2
Replacement rate, %	47.5	43.1	27.6	68.6
Culling rate, %	40.1	36.7	24.8	55.6
Death rate, %	4.4	4.0	1.7	7.5
Average parity of culled sows	4.5	4.6	6.0	2.9
Farm n=213; Median is a 50 percentile