Postpartum hemorrhage

The loss of 500ml or more of blood following a vagial delivery or the loss of 1000ml of blood following a cesearean delivery.

Risk factors:

  1. Large placenta (large surface area that  seperates from the uterine wall)
  2. Over disteeded uterus
  3. Uterine atony or low uterine muscle tone (decreases ability of the uterus to contract and close off vasculature that fed the placenta after it seperates from the uterine wall).

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