Patterns of alteration in boar semen quality from 9–37 months-old and improvement by protocatechuic acid

Background Comprehending the patterns of alteration in boar semen quality and identifying effective nutritional interventions are crucial for enhancing the productivity of commercial pig systems. This study aimed to examine the alteration in semen quality in boars, and assess the impact of protocatechuic acid (PCA) on semen quality dur- ing the phase of declining semen quality. Methods In Exp. 1, a total of 38 Pig Improvement Company (PIC) boars were selected and their semen quality data were...