This study was performed on the seed of the local plant plantago ovata which grow naturally in Iraq . Water and ethanolic extract of this seed are prepared. Two groups of laboratory mice are used in addition to another as control. The laboratory tests are done on blood samples from these mice , included calculate the time of brothrombin , coagulation and platelet count using different concentration of both water and ethanolic extracts of this plant. The results revealed the water extract of (20 and 30) caused a decrease in clotting time. Also the low concentration of crude extracts (water and ethanolic) were very efficient to decrease in clotting time, and increase platelet count .