The normal range of cervical length during pregnancy is between 2.5cm and 3.0cm, with abnormal shortening suggesting a risk of preterm labor.
Cervical length in pregnant women is generally not significantly different from non-pregnant women, ranging from 2.5cm to 3.0cm, and can be measured by vaginal ultrasound. Defining cervical length is important for diagnosing preterm labor.
Clinically, it is generally recognized that cervical length less than 2.5 cm before the 24th week of gestation increases the risk of preterm delivery, especially if the cervical length is less than 1.5 cm, and the risk of preterm delivery is low if the cervical length is 3.0 cm or more.
Timely monitoring of cervical length in pregnant women can clarify the risk of preterm labor as early as possible, and if necessary, treatment such as cervical cerclage can be carried out under the guidance of a medical professional to avoid adverse pregnancy outcomes.