What has been the evolution from 2012 to 2016 in the % of uterine prolapses out of the total farrows in the USA?
See a clue in the article Uterine prolapses in USA sow herds (I): Rate of prolapses over time
The average % of prolapses out of the total farrows ranged from 4.8 in 2012 to 10.2% in 2016. However, if we consider this number out of total number of dead sows this number ranged from 10.9% in 2012 to 19.5% in 2016
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