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Open full size image Key Abbreviations 17-α-hydroxyprogesterone 17-OH-P American College of Obstetricians and Gynecologists ACOG Cervical insufficiency CI Cervical intraepithelial neoplasia CIN Cervical length CL Diethylstilbestrol DES Interquartile range IQR Intraamniotic infection IAI Intramuscular IM Large loop excision of the…
Open full size image Key Abbreviations American College of Obstetricians and Gynecologists ACOG Cephalopelvic disproportion CPD Cesarean delivery CD Computed tomography CT Delayed cord clamping DCC Deep venous thrombosis DVT Fetal heart rate FHR Hypoxic-ischemic encephalopathy HIE National Institutes of…
Key Points Cervical insufficiency is primarily a clinical diagnosis characterized by recurrent painless dilatation and spontaneous midtrimester loss. Cervical insufficiency is rarely a distinct and well-defined clinical entity, but only one component of the larger and more complex spontaneous preterm…
Key Points In 1970, the CD rate was about 5%. By 2008, it had reached 32.8%, the highest rate ever recorded in the United States. The rates of vaginal births after cesarean delivery have plummeted, from a peak of 28.3%…

Summary of Key Points Transvaginal ultrasound (TVU) for cervical assessment is one of the best techniques for predicting preterm birth (PTB). A cervical length (CL) of less than 25 mm between 16 and 24 weeks' gestation is the most reliable threshold…