There is no way for the cervical canal to get longer at 2.6cm at 20 weeks of pregnancy.
At 20 weeks of pregnancy, the length of the cervical canal should be at least 3.0cm, and anything shorter than 2.5cm is considered abnormal. At present, the cervical canal is 2.6cm, which is also within the normal range, but it is on the short side, and there is a risk of preterm labor. If there are contractions or other high-risk factors for preterm labor, it can be dealt with by the following methods:
1. Conservative treatment: It is recommended that pregnant women pay more attention to bed rest, avoid strenuous exercise, avoid squatting for a long time, and use drugs to inhibit contractions, such as magnesium sulfate, if necessary, to slow down the shortening of the cervical canal and prolong the gestational weeks as much as possible.
2. Cervical cerclage: For pregnant women with a short cervical canal, which may be caused by cervical insufficiency, cervical cerclage can also be chosen as a treatment if necessary.
Generally, after the middle of pregnancy, you need to do regular ultrasound examination to pay attention to the length of the cervix, so as to avoid shortening of the cervical canal, which may lead to preterm labor.