Thanks for your query,
In proven cases of cervical incompetence
, circlage operation is necessary.Usually this treatment would be done for a woman who had suffered one or more miscarriages in the past, in the second trimester of pregnancy
. It is usually done at around 14 weeks or atleast 2 weeks earlier than the lowest period of previous wastage, as early as the 10th week.
Take care and best of luck..
Hope it helps..