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机译:
Univ Manitoba, Winnipeg, MB, Canada;
机译:Conceptional Age, Menstrual Age, and Ultrasound Agecolon; A Second-Trimester Comparison of Pregnancies of Known Conception Date With Pregnancies Dated From the Last Menstrual Period
机译:Transabdominal chorionic villus sampling in the second trimester of pregnancy: Feto‐maternal transfusions in relation to pregnancy outcome
机译:Transvaginal Chorionic Villus Sampling Using Transabdominal Ultrasound Guidance: A New Technique for First-Trimester Prenatal Diagnosis