作者单位:Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, Timone Hospital,Aix‐Marseille[1]Aix‐Marseille University, INSERM, MMG, U1251[2]Center for Prenatal Diagnosis and Human Genetics[3]Screening and Diagnosis Unit, Department of Obstetrics and Gynecology,Saint Joseph Hospital[4]