Impact of Crude Protein Intake in Last 14 Days of Pregnancy on Puerperium, Piglet Loss Prior to Weaning and Subsequent Reproduction of Sows

The impact of feed containing 13%, 15%, 18% and 21% of crude protein fed to groups of sows (marked A, B, C and D) from Day 100 of pregnancy until farrowing on puerperium, piglet loss prior weaning, fat depot differences, onset of reproductive activities after weaning, subsequent mating and the progesterone concentrations were studied. in groups A and B there were no puerperium disorders. Piglet loss before weaning reached 16.12 and 18.04% of all born piglets, 90% of sows became pregnant after the 1st insemination. in groups C and D the overall loss of all born piglets before weaning was 24.86 and 28.91%. The differences to groups A and B were significant (p p p p < 0.05) were found between groups A and D on Day 14 after weaning. We demonstrated a negative impact of high crude protein intake in last 14 days of pregnancy in sows on puerperium and piglet loss prior to weaning