Fig. 1From: Clinical application of cervical shear wave elastography in predicting the risk of preterm delivery in DCDA twin pregnancyMeasurement of cervical mean SWE value. Cervical stiffness of the inner, middle and outer regions of the anterior and posterior cervical lip was measured using SWE. Inner anterior cervical lip (ACL), inner posterior cervical lip (PCL); middle ACL, middle PCL; outer ACL, outer PCL. The diameter of the target regions of interest was set to 5 mmBack to article page