Fig. 3
From: Value of cervical strain in ultrasound elastography as a predictor of spontaneous preterm delivery
27-year-old female, with history of previous two preterm deliveries, included in the high-risk group. Upon her 1st visit (11wks), the following data were conducted A cervical length 2.9 cm. B EI of the whole cervix is 2 (moderately soft). C strain at internal os and external os are recorded to be high; 0.655 and 0.578, respectively. D EI of internal os is 2 (moderately soft, arrow). E EI of external os is 2 (moderately soft, arrow)