Impact of First-trimester Preeclampsia Screening on Perinatal and Maternal Morbidity (RANSPRE)

Inclusion Criteria : - Pregnancy between 11 and 14 WG - Age ≥18 years - Affiliated to or beneficiary of a health insurance system (including AME) - Signed willing to sign a consent form Exclusion Criteria : - Gestational age \<11 WG or \>14 WG - Known ectopic pregnancy - Known non-ongoing pregnancy - Known multiple pregnancy - History of PE in a previous pregnancy - Pregnancies complicated by major fetal abnormality identified at the first-trimester ultrasound if performed before randomization - Absence of health insurance - Contra-indication to aspirin (bleeding disorders such as von Willebrand's disease, active peptic ulceration, hypersensitivity to aspirin, active peptic ulceration, NSAID-exacerbated respiratory disease, severe liver or heart dysfunction) - Women taking low-dose aspirin regularly and started before pregnancy (except ART indication) - Age \<18 years - Poor understanding of the French language Always talk to your doctor about whether this trial is right for you.