Most common cause of cervical insufficiency is
Idiopathic
Previous dilatation
Exposure to DES
Conization
The most common cause of cervical insufficiency is idiopathicCervical incompetence may be congenital due to the following:Mullerian anomaliesCollagen disordersExposure to DES or the causes may be acquiredObstetric trauma like cervical laceration during deliveryMechanical dilatationCervical Conization
All India exam