Blood specimens are collected using routine blood collection tubes (EDTAK2 anticoagulated, purple or light purple cap), 2 ml/person, and quickly delivered to our center within 7 days at room temperature. Amniotic fluid specimens are collected using 15ml centrifuge tubes or 20ml syringes, 15 or 20ml of amniotic fluid is drawn, sealed, and quickly delivered to our center at room temperature. The Genetic and Prenatal Diagnostic Center of the First Affiliated Hospital of Zhengzhou University, Kong Xiangdong Remember: When mailing, please attach copies of relevant tests, especially genetic diagnosis results Mailing address: No. 1, East Construction Road, Zhengzhou City, Zhengzhou University First Affiliated Hospital, 2nd Floor, Outpatient Building, Prenatal Diagnostic Center, Kong Xiangdong Receive Tel: 13608604398 or 15037133788 Please contact in advance by email at [email protected]