Analyzes on 893 farms and about 1.5 million sows discards and deaths, by farm size, showing a correlation, more mortality on large farms (more than 4000 mothers) than in less than 900 mothers.

Make a comparison of three types of farm: with cages, pens and electronic stations. Sow death is similar between groups EXCEPT, in the top 25 of the stations, which presents the best data in ALL parameters. The mortality being approximately half of the other groups. 7% versus 3.6%.