American Journal of Obstetrics and Gynecology · 1996 · 11 citations · 18 references
MedicineGynecologyObstetricsMaternal-fetal MedicinePrenatal DiagnosisUltrasonographyFirst-trimester UltrasoundInvasive Prenatal TestingPregnancy DiagnosisPrenatal AssessmentPrenatal CareFirst Trimester UltrasonographyFirst-trimester Pregnancy AssessmentFirst-trimester Pregnancy UltrasoundFirst-trimester Prenatal Diagnosis
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PCR protocols — A guide to methods and applications
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