Placental abruption is one of the most common placental disorders, occuring in 1 out of 100 pregnancies. It often occurs in the third trimester. Placental abruption happens when your placenta begins to detach from your uterine wall before your baby has been born. There are varying degrees of placental abruption: the placenta can detach in small areas, or it can completely detach from your uterus.
What Causes Placental Abruption?
Unfortunately, the cause of placental abruption remains unknown. Certain factors do seem to contribute to the disorder, including abdominal trauma, premature rupture of the membranes, or smoking during pregnancy.
at 1:09 AM on Jan. 26, 2009