Abstract Objective: To explore the predictive value of cervical maturity evaluated by transperineal sonography。Methods: Collect single mature primipara 119 cases during 2014.10-2015.12. Measure the cervical morphological indicators by transperineal sonography including cervical length, width cervix, the mouth of the amniotic sac embedded in the depths, The values were recorded and ultrasound scores were carried out . And track the birth outcomes。Results: The shorter of the cervical length, the expansion of the cervix, the increasing scores of the mouth of the amniotic sac embedded in, the cervical ripening increases, then the labor time is shortened. The difference was statistically significant between the groups. The cervical ultrasound morphological scores respectively were≥9 were 23 cases, labor time was 4.4 ± 1.8 h; 5?8 were 77 cases, labor time was 33.9 ± 8.2 h; ≤4 were 19 cases, labor time was 79.0 ± 6.7 h, and the difference was statistically significant (p <0.05)。Conclusion: The cervical maturity could be evaluated by transperineal sonography through measurement of cervical morphological indicators. It could predict the time in labor and the mode of delivery in the single mature primiparas, and it is also a safe and effective mean of checking.