Abstract: Objective To analyze the relationship between parameters of ultrasonic elastography using E-cervix and the mode of delivery in pregnant women with pregnancy-induced hypertension (PIH) in the late trimester of pregnancy. 
Methods In total, 100 pregnant women with PIH in the late trimeser of pregnancy who underwent prenatal examination were included. All pregnant women were examined with ultrasonic elastography using E-cervix. All pregnant women were followed up until the final delivery. All pregnant women were divided into two groups (natural delivery and cesarean section) according to the mode of delivery, and the impact of parameters of ultrasonic elastography using E-cervix on the choice of delivery mode in pregnant women with PIH in the late trimester of pregnancy was analyzed. 
Results According to the follow-up statistics, 63 patients (63.00%) had spontaneous delivery in 100 pregnant women with PIH in the late trimester of pregnancy, and 37 had cesarean section, accounting for 37.00%. The elasticity contrast index (ECI) and cervical external os strain (EOS) in the natural delivery group were higher than those in the cesarean section group, and the hardness ratio (HR), cervical length (CL), cervical internal os strain (IOS) and cervical internal and external os strain ratio (IOS/EOS) were lower than those in the cesarean section group, showing significant differences (P＜0.05). Point-biserial correlation confirmed that there was a positive correlation between the parameters of ultrasonic elastography using E-cervix and the mode of delivery in pregnant women with PIH in the late trimester of pregnancy (P＜0.05). 
Conclusion Parameters of ultrasonic elastography using E-cervix can be used to evaluate the changes of cervical tissue, or as a semi-quantitative indicator of cervical maturity, which has a certain guiding significance for the selection of delivery mode in pregnant women with PIH in the late trimester of pregnancy. 

Key words: hypertension, pregnancy-induced, late trimester of pregnancy, parameters of ultrasonic elastography using E-cervix