2000 PigCHAMP Breeding Herd Summary in Japan
Measurement	Average	Median	Upper 25%	Upper 10%
BREEDING PERFORMANCE
Repeat services, %	12	10.6	8.3	6.1
Multiple matings, %	89.6	92.6	97.3	98.5
Entry-to-service interval, days	62.9	68.4	50.3	23.8
Sows bred by seven days, %	84.6	85.5	90.1	92.7
Weaning-to-first-service interval	8.3	7.4	6.9	5.9
Average nonproductive days	83	78	72	62
FARROWING PERFORMANCE
Average gestation length	115.5	116	115	115
Average parity of farrowed sows	3.84	3.9	4.2	4.4
Farrowing interval	151	149	147	144
Farrowing rate, %	80.6	82.5	84.3	86.8
Average total pigs/litter	11.7	11.7	12.1	12.4
Average pigs born alive/litter	10.5	10.6	10.9	11.2
Average stillborn pigs	1.1	1.1	0.9	0.8
Average mummies/litter	0.1	0.1	0	0
Percent < 7 born alive	10	9.6	7.7	5.7
PWM for farrowed and weaned	12.3	12	9.7	7.3
Litters/female/year	2.06	2.1	2.17	2.22
Litters/mated female/year	2.25	2.28	2.35	2.39
Old litters/mated female/year	2.24	2.27	2.36	2.43
Litters/farrowing crate/year	11.3	11.1	12.7	14.1
WEANING PERFORMANCE
Pigs weaned/litter weaned	9.3	9.3	9.7	9.9
Average age at weaning	21.4	21.2	19.9	18.7
Adjusted 21-d litter weight (kg)	60	60	64	66
Pigs weaned/sow	9.2	9.3	9.7	9.9
Pigs weaned/mated female/year	20.7	21.1	22.6	23.8
Old pigs weaned/mated female/year	20.8	21.4	22.7	23.4
Pigs weaned/female/year	19.1	19.2	20.7	21.6
Pigs weaned/lifetime	42.7	43	52	58
Pigs weaned/farrowing crate/year	105	103	124	130
POPULATION
Average female inventory (AFI)	242	187	290	443
AFI/farrowing crate	5.6	5.6	6.2	6.7
Average gilt pool inventory	22	14	23	61
Sow:boar ratio	14	14	11	20
Average parity	2.9	2.9	3.1	3.3
Replacement rate, %	45.2	42.1	47.9	64.1
Culling rate, %	36.7	34.8	41.5	48.3
Death rate, %	4.7	4.3	3	1.6
Average parity of culled sows	4.8	4.8	5.7	6.3
Farm n=84;  Median is 50th percentile.