The investigators hypothesize that the white matter of patients with obstetric antiphospholipid syndrome deteriorates over time

Inclusion Criteria:

• The patient must have given their free and informed consent and signed the consent form
• The patient must be a member or beneficiary of a health insurance plan
• The patient is at least 18 years old
• For the target population: only women included in the publication by Pereira et al (2016) will be included, with no obsteric history (fetal death >10 weeks or 3 unexplained consecutive losses <10 weeks)
• For the test group: Patients must be positive for antiphospholipid antibodies based on results from Pereira et al (2016)
• For the control group. Patients must be negative for antiphospholipid antibodies according to results from Pereira et al (2016)

Exclusion Criteria:

• The subject is participating in a category 1 interventional study, or is in a period of exclusion determined by a previous study
• The subject refuses to sign the consent
• It is impossible to give the subject informed information
• The patient is under safeguard of justice or state guardianship
• The patient is pregnant, parturient or breast feeding
• The patient is claustrophobic
• The patient has a metallic foreign body (e.g. pacemaker)
• The patient has experienced pregnancy loss linked to infectious, metabolic, anatomic or hormonal factors