Cervical incompetence, or insufficiency, happens when the cervix starts to open too soon during pregnancy. In your case, with a cervical length of 31mm at 20 weeks, it might have put you at a higher risk. Now, for next time, we can consider a few precautions. We may monitor your cervical length more closely in early pregnancy and discuss the option of a cervical cerclage, a procedure where the cervix is stitched closed to provide support. It's also important to avoid heavy lifting and take it easy. When you plan your next conception, we can create a personalized care plan to help support a healthy pregnancy.