Radiofrequency Electromagnetic Fields and Pregnancy : Exposure Specificities and Evolution

Inclusion Criteria: * Pregnant women over 18 years of age; * Subject not opposed to participating in the study; * Patient performing the three screening ultrasounds recommended by the French National Authority for Health (HAS) at the Universitary hospital of Besançon during her pregnancy (independently or in addition to on-site clinical pregnancy monitoring); Affiliation with a French social security scheme or beneficiary of such a scheme; Living within the Universitary hospital of Besançon maternity catchment area, to cover the full range of geographical exposure, including both highly urbanized and more rural areas; Exclusion Criteria: * Opposition of the subject to participate in the study; * Discontinuation of pregnancy ultrasound follow-up at Besançon University Hospital, in particular due to relocation; * Women under court protection, guardianship, curatorship or protective supervision.