Fig. 5
From: Value of cervical strain in ultrasound elastography as a predictor of spontaneous preterm delivery
35-year-old female, no history of preterm delivery, included in the low-risk group. Upon her 1st visit (12 Wks.) the following data were conducted: A cervical length is 5.1 cm B EI of the whole cervix is 2 predominately with noted areas of index 4 being (moderately soft). C strain at internal os and external os is higher than expected to be 0.496 and 0.400, respectively. D EI of the internal os is 1 (mildly soft). E EI of the external os is 2 (moderately soft)