0.05). In brief, regarding to the in vivo beneficial effects of LMWH, dalteparin is more recommended. Key words: rat, heparin, low molecular heparin, peritoneal adhesion, infectious peritonitis.]]> 0.05). The relative weight of liver and gizzard in early feeding groups increased in comparison to control group (p£|0.05) and post hatch feeding could increase relative length of small intestine(p£|0.05). In conclusion, according to the results of this study, performance and growth of digestive tract of broiler chicks that received post hatch feeding was more than control. Also, comparison of different methods of early feeding showed that high humidity of gel caused more benefits on performance of broilers. Key words: broiler, post-hatch feeding, performance, digestive tract.]]>