1 Obstetrics, Gynecology and Reproductive Medicine Department, Quirón Dexeus University Hospital, Barcelona, Spain.
2 Obstetrics Department, Hospital Clínico Lozano Blesa, University of Zaragoza and Instituto de Investigación Sanitaria de Aragón (ISS-Aragón), Zaragoza, Spain.
3 BCNatal, Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), IDIBAPS, University of Barcelona, and Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona, Spain.