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 informed consent 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