Ultrasound Scans & Prenatal Screening · Measuring Nuchal Translucency and Crown Rump Length: 12–13 weeks scan · Down syndrome (trisomy 21) - ... ... <看更多>
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Ultrasound Scans & Prenatal Screening · Measuring Nuchal Translucency and Crown Rump Length: 12–13 weeks scan · Down syndrome (trisomy 21) - ... ... <看更多>