References
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- Rovas L, Sladkevicius P, Strobel E, Valentin L. Three-dimensional power Doppler ultrasound assessment of the cervix for the prediction of successful induction of labor with prostaglandin in prolonged pregnancy. J Ultrasound Med. 2005; 24: 933–9
- Rovas L, Sladkevicius P, Strobel E, Valentin L. Reference data representative of normal findings at two-dimensional and three-dimensional gray-scale ultrasound examination of the cervix from 17 to 41 weeks’ gestation. Ultrasound Obstet Gynecol. 2006; 27: 392–402
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