Introduction: one of the principle reasons for anemia in pregnant women is postpartum hemorrhage. Synthetic drugs with all their efficiency ,have distructive effects. Active bleeding control with chemical medications is popular and herbal medications are less used. a ccording to alternative medicine, herbal product usage is necessary . This study is done according to grape seed powder effect on hemoglobin and hematocrit levels postpartum. Methods : This study was a Double blind clinical trial on 120 mothers were eligible for vaginal delivery. Randomly devided to 4 groups (each group includes 3o percent) according to cards. 3 groups are grape seed powder receivers ( 50 ,100,150 doses) and controller group ( placebo capsule receiver which is filled by starch ), each group take its dose with one glass of warm after placenta exodus .before and after delivery 24 hour ,blood sample was taken for Hemoglobin and Hematocrit levels measurements. After gathering information , data Spss softwareversion 15 . Results:4 groups were equal in all case study variables. Upon main purpose of research , results showed that fall percentage of Hemoglobin and Hematocrit levels had significant difference between 4 groups,24 hours after delivery. Conclusions: it is seen in present study that grape seed powder can reduce bleeding after delivery and it can prevent Hemoglobin and Hematocrit reduction caused by extra bleeding .as a result , grape seed powder can be used as a secondary medication for bleeding reduction in stage 3 and stage 4 of delivery ,we can teach the importance of its consumption in educational workshops . of course ,it needs more study in different doses, single dose and retentive.