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Table 2 Characteristics of the high productive sow herd

From: An evaluation of gonadotropin-releasing hormone analogue administered to gilts and sows on subsequent reproductive performance and piglet birth weight

  Herd characteristic
Number of sows 400
Breed Topigs 20
Batch management system (weeks) 4
Lactation length (weeks) 3
Piglets weaned per sow per year 32.4
Average WEI (days ± SEM) 6.5 ± 0.3
Age of gilts at first insemination (days ± SEM) 270 ± 15
Type of housing for pregnant sows (<4w of gestation) Individual Stalls
Type of housing for pregnant sows (>4w of gestation) Pens with groups of 18 sows
Vaccinations of gilts (weeks post arrival in quarantine)  
 Parvovirus & Erysipelothrix rhusiopathiae 0 – 3
 Escherichia coli 1 – 4
 Atrophic rhinitis 1 – 4
 Porcine Reproductive and Respiratory Syndrome virus 0 – 3
Vaccinations in sows (weeks pre/postpartum)  
 Parvovirus & Erysipelothrix rhusiopathiae +2
 Escherichia coli - 3
 Atrophic rhinitis - 3
 Porcine Reproductive and Respiratory Syndrome virus - 7