What increases the chances of placenta abruption?

The following conditions increase the chances of placenta abruption:

  1. Maternal hypertension
  2. Chorioamnionitis
  3. Advanced maternal age (> 35 years)
  4. Premature rupture of the membranes
  5. Trauma to the abdomen
  6. Multiple fetuses
  7. Previous history of placental abruption
  8. Substance abuse  
  9. Short umbilical cord
  10. Polyhydramnios
  11. External cephalic version 

Question: Amniocentesis could also cause abruptio placenta. Yes/No

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