부가기능
TRANSACTIONS OF THE TWENTIETH ANNUAL MEETING OF THE SOCIETY FOR MATERNAL-FETAL MEDICINE - Use of cervical ultrasonography in prediction of spontaneous preterm birth in twin gestations - In twin gestations cervical length of <=2.0 cm between 15 and 28 weeks' gestation was at least as good as other ultrasonographic cervical parameters in predicting spontaneous preterm birth./
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