Comparison of Pelvimetric Measurements Between MRI and Low-dose Stereoradiography (EOS® Imaging System)

Inclusion Criteria: * Patients \> 18 years of age * Patient requiring pelvimetry (breech fetus) * Gestation \> 36 SA (weeks of amenorrhea) * Patients with BMI \< 35 * Affiliated to social security or similarly regime * Patients who gave their consent to participate in the study (Patient having agreed to perform both examinations: MRI and EOS system) Exclusion Criteria: * Patient with a contraindication to MRI (claustrophobia, pace-maker, intracorporeal metallic element) * Patient with a contraindication to performing EOS® (person not standing alone) * Patient who are in exlusion period of another interventiionnal study * Person deprived of freedom by judicial or administrative decision; person hospitalized for psychitric care; person under legal protection measure.