Causes :

• Maternal hypertension - Most common cause of abruption, occurring in approximately 44% of all cases
• Maternal trauma (eg, motor vehicle collision [MVC], assaults, falls) - Causes 1.5-9.4% of all cases
• Cigarette smoking
• Alcohol consumption
• Cocaine use
• Short umbilical cord
• Sudden decompression of the uterus (eg, premature rupture of membranes, delivery of first twin)
• Retroplacental fibromyoma
• Retroplacental bleeding from needle puncture (ie, postamniocentesis)
• Advanced maternal age
• Idiopathic (probable abnormalities of uterine blood vessels and decidua)