Postpartum hemorrhage (PPH) involves blood loss of greater than 500 mL within 24 hours regardless of the mode of birth. However, there is no universally accepted defi nition, and consideration should be given to physiologic response in addition to absolute blood loss. PPH is the most frequent indication for ICU admission. In 60% to 70% of cases, the cause of PPH is failure of uterine contraction following delivery. Th is uterine atony results in continuous bleeding that is often painless. Placental retention is the second most common cause of PPH (20% to 30% of cases). Genital trauma results in approximately 10% of cases of PPH and usually is associated with laceration of the vagina/cervix following instrumental delivery. Coagulation disorders may also result in PPH.