宫颈机能不全、晚期流产3次：分别于2011年、2014年孕20周因“难免流产”完全自然流产，2016年诊断宫颈机能不全;2016年第三次怀孕于孕16周行宫颈外口环扎术，孕26周再次自然流产。

Cervical insufficiency and advanced miscarriage 3 times: in 2011 and 2014, 20 weeks of pregnancy due to "inevitable miscarriage" complete spontaneous miscarriage, in 2016 diagnosis of cervical insufficiency; In 2016, the third pregnancy was performed on the 16th week of pregnancy. The pregnancy was naturally aborted again in 26 weeks.

陈凤林教授答复：晚期流产3次诊断是宫颈机能不全以前做过宫颈外口环扎术的女性，可以做宫颈埋箍安太环治疗，建议：孕前宫颈埋箍

Professor Chenfenglin replied: The third diagnosis of advanced miscarriage is a cervical insufficiency. A woman who has previously had a cervix outer mouth ring can be treated with a cervix entrapment.