Predicting cervical insufficiency in twin pregnancies using ultrasound cervical measurements and elastography

Background: To evaluate the predictive effect of transvaginal ultrasound measurement of cervical length and cervical elasticity examination on cervical insufficiency in twin pregnancies. Methods: Data from twin pregnant women in our hospital were collected retrospectively, including relevant vaginal ultrasound parameters (e.g., cervical length, cervical elasticity score, and the strain value of each part of the cervix). We assessed the risk factors using receiver operating characteristic curve analysis to evaluate the predictive effect of each factor on the occurrence of cervical insufficiency. Results: A total of 284 pregnant women with twin pregnancies, including 142 with cervical insufficiency and 142 without cervical insufficiency, were included. Significant differences between the two groups were observed in the use of assisted reproductive technology, age, history of second-trimester miscarriage, etc. The cervical length of pregnant women with cervical insufficiency was significantly shorter at 22-24 weeks of gestation. Cervical length had the largest area under the receiver operating characteristic curve for predicting cervical insufficiency at that time. The area under the curve of cervical insufficiency predicted by the cervical elasticity score at 12-14 weeks of pregnancy was greater than that predicted by the cervical length at the same time, and the area under the curve of cervical insufficiency predicted by the elasticity score and pre-pregnancy body mass index during the same period was the largest. Conclusions: The cervical elasticity score at 12-14 weeks of gestation effectively predicted the occurrence of cervical insufficiency. The combination of the cervical elasticity score and pre-pregnancy body mass index predicted cervical insufficiency in women with twin pregnancies.