Professor Chenfenglin pointed out: The cervix ring is generally selected after four months. The specific practices and effects are as follows:
The traditional cervix ring is tied with silk thread around 16-20 weeks of pregnancy. The defect is that the incision is only external. Once the contractions are started, they can not effectively prevent the expansion of the cervix, and they can easily induce contractions and miscarriages. After suture, it is also easy to cause cervix infection. Causes the fetal membrane to break early Miscarriage, the success rate is less than 20 %. The efficiency of the new generation of high ring Za Antai is 99.9 %.