What is the success rate of pregnancy with short cervix of 7mm?

It is true that success rates are higher when the cerclage is placed earlier, because usually there is more cervix left and the stitch is more stable. If you started off with a cervix of 7mm and then the stitch was placed, then there is barely anything the stitch can hold to, meaning it's at high risk for ripping out if the cervix changes any more. Your situation is obviously a high risk one and there is no predicting what will happen.

It could hold until 36 weeks or you could have it fail tomorrow. Being on bedrest is the only small thing you can do to prevent that from happening, but honestly, even when you do everything right there is always the possibility it will fail anyway. Some things are just out of your control.

Obviously every day you stay pregnant at this point is beneficial to your baby. At 23 weeks survival rates are about 50% (depending on your hospital), and yes, a lot of babies can end up with long-term complications. By 28 weeks, survival rates rise above 95% and ... more.

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