DOI:
10.1055/s-00000009
American Journal of Perinatology
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References
Iams JD, Johnson FF, Sonek J, Sachs L, Gebauer C, Samuels P.
Cervical competence as a continuum: a study of ultrasonographic cervical length and obstetric performance.
Am J Obstet Gynecol 1995;
172 (4 Pt 1): 1097-1103
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