Inclusion Criteria:  Mothers giving birth to premature babies less than 29 weeks of amenorrhea (WA), after obtaining their non-opposition. Mothers giving birth at term between 39 and 41WA+6 days, after obtaining their non-opposition. ≥18 years Mothers not under legal protection  Exclusion Criteria:  Mothers giving birth between 29WA and 38WA+6 days Mothers in critical condition. Person not affiliated to national health insurance For full-term mothers: patient presenting or having presented a health condition that affected a previous pregnancy (vascular such as pregnant hypertension, preeclampsia; gestational diabetes; intrauterine growth retardation, maternal infection during pregnancy such as toxoplasmosis, cytomegalovirus, rubella, measles, chickenpox).