In Exp. 1, a total of forty eight multiparous sows were used in a 21-d performance assay. All litters were standardized at eleven piglets within 24h of parturition. Sows were fed one of the four experimental diets 1) CON (basal diet; Control), 2) MP1 (basal diet added 0.05% of medicinal plant mixtures), 3) MP2 (basal diet added 0.1% of medicinal plant mixtures) and 4) MP3 (basal diet added 0.2% of medicinal plant mixtures). Backfat thickness difference from farrowing to weaning was tended to

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... rease in CON treatment compared to those of medicinal plants mixture (MP) treatments. However, there were not significant differences among the treatments (P>0.05). Sow's ADFI was increased in sows fed MP2 treatment compared to MP3 treatment (P<0.05). Piglet weight gain was tended to increase in MP1 treatment compared to CON treatment (P<0.05). The glucose concentration of MP3 treatment was higher that of CON treatment (P<0.05). Exp. 2, a total of one hundred twenty weaning pigs (L×Y×D, 4.70 ± 0.63 kg average initial body weight) were used in a 20-d performance assay. Weanling pigs were fed treatments diets included 1) CON (basal diet; Control), 2) MP0.05 (basal diet added 0.05% of medicinal plant mixtures), 3) MP0.1 (basal diet added 0.1% of medicinal plant mixtures) and 4) MP0.15 (basal diet added 0.15% of medicinal plant mixtures). Through entire experimental period, as MP increased in the diets, there was an increase in ADG (linear, P<0.067), improvement gain/feed (linear, P<0.018) and a decrease in ADFI (linear, P<0.008). DM digestibility was significantly increased with addition of MP(linear, P<0.004; quadratic, P<0.030). In conclusion, sows fed MP2 had showed less body weight loss and increased weight gain for suckling piglet. In weaning pigs, as supplementation MP from 0.05 to 0.1% in diet had improved growth performance and DM digestibility. (Kwon et al. ; Effect of Medicinal Plants for Pigs --502