DOI:
10.1055/s-00030576
Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics
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References
Sonek JD, Iams JD, Blumenfeld M, Johnson F, Landon M, Gabbe S.
Measurement of cervical length in pregnancy: comparison between vaginal ultrasonography and digital examination.
Obstet Gynecol 1990;
76 (02) 172-175
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