Inclusion Criteria:  Adult women  Admitted to the CHUGA for a birth or an abortion. Pregnant women consenting to the collection of their fetal placenta membranes, during premature deliveries or at term of pregnancy OR Women performing an abortion consenting to the collection of their abortion products. Having signed a consent Affiliated with social security  Exclusion Criteria:  Placental sample or abortion product unavailable (not collected or necessary for treatment). Patient with known positive HIV or Hepatitis B or Hepatitis C serology or at risk according to the infectious safety criteria applied by the EFS. hemoglobin <7d / dL or hemoglobin <10g / dL if she suffers from a cardio-respiratory pathology). Patient protected by law (minor, hospitalized under duress, subject to a legal protection measure by guardianship or curatorship, deprived of liberty by judicial or administrative decision)