The procedure is called cervical cerclage. It's been in use for more than 20 years.
手术叫做宫颈环扎术，已经有二十多年的历史了。
英语百科
Cervical cerclage
Cervical cerclage, also known as a cervical stitch, is a treatment for cervical incompetence or insufficiency, when the cervix starts to shorten and open too early during a pregnancy causing either a late miscarriage or preterm birth. Usually the treatment is done in the second trimester of pregnancy, for a woman who had either one or more late miscarriages in the past.