FORMULA

            Live Born + StillBorn + Mummified

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                      Number of Farrow 




Where:


Live Born Period: number of piglets born alive during an analyzed period 


StillBorn Period: number of stillborn piglets during an analyzed period 


Mummified Period: number of mummified piglets during an analyzed period 


Number of Farrow Period: Number of farrowing during an analyzed period