Maintaining a Prone Position After Use of an Epidural Blood Patch for the Treatment of Post-dural Puncture Headache

Inclusion Criteria: * The patient was informed about the implementation of the study, its objectives, constraints and patient rights * The patient has signed the informed consent * The patient must be affiliated or beneficiary of a health insurance plan * The patient is available for follow up concerning her hospital stay * The patient has a post-dural puncture headache after a vaginal delivery. The diagnosis of post-puncture headache is retained on the basis of a frankly postural character for the headache, triggered or exacerbated by orthostatic position and relieved by recumbency. * The patient has an indication for a blood patch Exclusion Criteria: * The patient is participating in another interventional study, with the exception of the following studies: Papillo PMA (2013-A00538-37); DG-Postpartum (2013-A00277-38); ElastoMAP (2013-A01148-37); ElastoDéclench (2014-A00828-39); LXRs(2009-A00968-49); OASIS II (2013-A00773-42); GrossPath (2014-A01120-47). * The patient is in an exclusion period determined by a previous study * The patient is under guardianship, curatorship or under judicial protection * The patient refuses to sign the consent * It is not possible correctly inform the patient * The patient is pregnant * The patient has a contra-indication (or an incompatible combination therapy) for a necessary treatment in this study * The patient was delivered by cesarean section