The cervix is the lower part of the uterus, and its length plays a crucial role during pregnancy.
In the first trimester, the cervix typically measures around 3.5 to 4 cm.
During the second trimester, a normal cervix length remains between 3 to 4 cm.
A cervical length shorter than 2.5 cm at 16–24 weeks could increase the risk of preterm labor.
If the cervix shortens too early, it may be diagnosed as cervical insufficiency.
Transvaginal ultrasounds are the most accurate method to measure cervix length.
It may naturally shorten to around 1 to 2 cm as the body prepares for labor.
A cerclage, or stitch, can be placed to prevent early dilation in case of a short cervix.
Progesterone can help prevent cervix shortening by strengthening the cervix and supporting pregnancy.
Regular cervical checks between 16 to 24 weeks are essential for high-risk pregnancies.