[Fixed acids in protracted parturition].

The levels of lactic acid, pyruvic acid, and L/P index were studied in 15 cows during protracted parturition. All the indices under study respond to the stress to which the organism is exposed as a result of continuing parturient activity:the indices increase in their values, and the peak values occur when the foetus is delivered. The levels of lactic acid and pyruvic acid drop immediately after parturition and the L/P index values decrease from the first hour post partum.