The present study included pregnant women with a gestational age between 28-42 weeks who delivered vaginally at the delivery room, Charoenkrung Pracharak Hospital, between July 2009 and March 2010 . All women had a singleton pregnancy and no severe past medical histories such as cardiovascular disease, asthma, epilepsy, thyrotoxicosisn and thrombocytopenia. Complete blood count with a platelet level more than 150 x 109/L was checked in all cases. Also, cases with polyhydramnios or treated with magnesium sulfate were not included. Cases with complications comprising uterine inversion or rupture, hematoma or severe laceration of birth canal, retained placenta and bleeding diathesis such as disseminated intravascular coagulopathy (DIC) were excluded from the comparison of both groups. The present study was ceased and further appropriate management would be established when these women experienced blood loss exceeding 2,000 ml or unstable vital signs.