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Pregnancy
Gestational Age
Second Pregnancy Trimester
Caesarean Section
Pregnancy Outcomes
Prospective Studies
Retrospective Studies
Ultrasonography, Prenatal
Cervical Cerclage
Labor, Induced
Prenatal Diagnosis
Cervix Uteri
Premature Obstetric Labor
Premature Birth
Pregnancy, High-Risk
Uterine Cervical Incompetence
Down's Syndrome
Oxytocin
alpha-Fetoproteins
Newborn Infant
Co-Publications
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16
14
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