Primary postpartum hemorrhage is most commonly caused by: (DNB June 2011)
1. Hemorrhage that occurs after childbirth is known as postpartum hemorrhage.
2. Early postpartum hemorrhage is defined as a blood loss of > 500 ml of blood during the 1st 24 hours after delivery.
3. The most common cause is loss of uterine tone (uterine atony-80%) caused by over-distention, prolonged or precipitate labor uterine over-stimulation, trauma, rupture, or inversion, lacerations of the lower genital tract, or blood coagulation disorder. Late postpartum