Cervical Incompetence


Cervical dilatation in the absence of any abdominal pain


  • Cervical dilatation during termination of pregnancy
  • Cone biopsy of the cervix (for suspected cervical cancer/neoplasia)
  • cervical amputation during Manchester repair for uterine prolapse
  • Exposure to DES (di-ethyl-stilboestrol)- a synthetic oestrogen drug that was prescribed up until the mid 70s.
  • 25% of cases are idiopathic


  • Cervical cerclage
    • Shirodkar’s or McDonald’s suture usually performed at 14 weeks gestation.  There is a small risk of rupturing membranes and infection.  The stitch is then removed at 36 weeks or at labour (whichever is earlier).

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