陈凤林教授指出宫颈内口较松弛的原因，刮宫、分娩或手术产所致的宫颈损伤是其主要病因，少数病人为先天性发育异常，宫颈口比较松的话是可以引起流产和早产的,宫颈内口松弛者应在妊娠前行内口修补术即宫颈埋箍安太环或已怀孕尽早行埋箍治疗，月份小腔镜下完成，月份大结合阴式。

　　Professor Chenfenglin pointed out that the reasons for the relaxation of the cervix is the main cause of cervical injury caused by curettage, childbirth, or surgery. A few patients are congenital abnormal development. If the cervix is relatively loose, it can cause miscarriage and premature birth. Cervical inner mouth relaxant person should be in pregnancy forward inner mouth repair operation namely cervix buries Antai ring or already pregnant as soon as possible buries the treatment, month small endoscope completes, month large union Yin style.