Received: 3 August 2019
Accepted: 22 November 2019
First Online: 28 November 2019
Ethics approval and consent to participate
: In line with French regulations regarding prenatal diagnosis, written informed consent was obtained from all patients. CERBA Laboratory is authorized by the Regional Health Agency to perform cfDNA screening tests. This research was approved by The Ethical Review Committee of the French CEROG (submission number CEROG 2018-OBST-0103).
: Not applicable.
: The authors declare that they have no competing interests.