Study Evaluating the Effectiveness of the Use of Prosthesis With Trans-Obturator Way for the Correction of Anterior Prolapse

Inclusion Criteria: * Women over 18 years old * Genital anterior prolapse requiring surgical correction and with stage III or IV in the classification of Pelvic Organ Prolapse - Quantification or POP-Q * Ability to understand the information and to sign a consent form * Patients wishing an intervention because of the inconvenience caused by the prolapse. Exclusion Criteria: * Prolapse stage \<III in the classification POP-Q, and prolapse without functional inconvenience * Progressive or latent infection, or signs of tissue necrosis in the clinical examination * Troubles resulting in an unacceptable risk of post-surgery complications investigated at the interview with the patient (disorders of blood clotting, immune system disorders, progressive diseases….) * Mobility of the lower limbs reduced (not permitting the positioning for the surgery) * Pregnancy or any desire of pregnancy during the study, within two years * Pelvic surgery in the last 6 months * Patients who have had radiotherapy of the pelvic area in an irrespective time * A history of pelvic cancer * Known hypersensitivity to any component of the prosthesis (polypropylene) * Uncontrolled diabetes (HbA1c\> 8%) * Treatment modifying the immune response (immuno-modulators), current or stopped for less than one month * Inability to understand the information and to sign a consent * A person not subject to social security, deprived of freedom, or under legal guardian