Clinical trial Recruiting at 14 sites Phase 3 Interventional Ages 18 and up Women only

Using aspirin to prevent complications in pregnant women with chronic hypertension

Official title: Chronic Hypertension and Acetyl Salicylic Acid in Pregnancy, a Multicenter Prospective Randomized Double-blind Placebo-controlled Trial.

Run by Centre Hospitalier Intercommunal Creteil · NCT04356326 · Data updated 2026-11-12

This study is testing whether taking low-dose aspirin during pregnancy can help prevent serious complications for women with chronic high blood pressure and their babies.

More Pre-Eclampsia trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years and up
SexWomen only
Enrollment500 (estimated)
SponsorCentre Hospitalier Intercommunal Creteil
Academic / other
Locations20 sites (Bordeaux and 19 other locations)
StatusRecruiting
StartedFebruary 15, 2021
Main results expectedFebruary 28, 2029
Study endsFebruary 2030
Registry record updatedJune 12, 2026
Trial IDNCT04356326 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are pregnant women between 10 and 19 weeks of gestation with a diagnosis of chronic hypertension.

Probably not a fit

Patients with medical histories requiring anticoagulation or those with significant proteinuria or active bleeding may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial evaluates the effectiveness of acetylsalicylic acid (aspirin) at a dosage of 150 mg per day, administered before 20 weeks of gestation, in preventing maternal and fetal complications in pregnant women suffering from chronic hypertension. Chronic hypertension can lead to severe complications such as preeclampsia, intrauterine growth restriction, and even perinatal death. The study aims to provide evidence for the use of low-dose aspirin as a preventive measure, addressing a significant gap in treatment options for this high-risk population. Participants will be randomly assigned to receive either aspirin or a placebo to assess the outcomes.

Why it matters

Potential benefit: If successful, this study could significantly reduce the incidence of severe complications in pregnant women with chronic hypertension, improving maternal and fetal health outcomes.

How similar studies have gone: Previous studies have suggested potential benefits of low-dose aspirin in similar populations, but this specific approach is being rigorously tested for the first time in this context.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Pregnant patient between 10 and 19 weeks of gestation + 6 days
* Chronic hypertension, whether treated or not, know before pregnancy or diagnosed before randomization
* Singleton pregnancy
* Signed the written informed consent
* Affiliation to social security

Exclusion Criteria:

* ---Medical history requiring anticoagulation (antiphospholipid syndrome, deep vein thromboembolic disease, pulmonary embolism, atherothrombosis, patient with mechanical heart valves),
* Patient receiving aspirin for another indication outside pregnancy,
* Patient with significant proteinuria (\> 300mg/24 hours or a proteinuria/creatininuria ratio ≥ 30mg/mmol),
* Active bleeding,
* History of severe PE with delivery \< 34 weeks of gestation,
* Hypersensitivity to salicylates such as aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs),
* Platelet count lower than 100,000 cells/microliter (dosage less than 6 months old),
* Hemostasis disorders, including hemophilia (with thrombocytopenia)
* Any constitutional or acquired hemorrhagic disease, (including digestive hemorrhages, history of hemorrhagic stroke and thrombocytopenia
* Human immunodeficiency virus, or hepatitis B virus, or hepatitis C virus positive serum,
* Patient included in another interventional study which could interfere with the results of the study,
* Age \<18 years old,
* Women under the protection of justice,
* Patients with psychiatric follow-up, poor understanding of French or cognitive problems,
* Duodenal ulcer,
* Severe renal impairment,
* Severe hepatic insufficiency,
* Severe cardiac impairment,
* Gout,
* Patients with known glucose-6-phosphate dehydrogenase deficiency,

Where it's running

  • CHU Bordeaux
    Bordeaux, France
    Recruiting
  • CHU Antoine Béclère, AP-HP
    Clamart, France
    Recruiting
  • Hôpital Louis Mourier, AP-HP
    Colombes, France
    Recruiting
  • Centre Hospitalier Intercommunal de Créteil
    Créteil, France
    Recruiting
  • CHU Dijon
    Dijon, France
    Recruiting
  • CHU Bicêtre, AP-HP
    Le Kremlin-Bicêtre, France
    Recruiting
Show 14 more locations
  • CHU Lyon
    Lyon, France
    Recruiting
  • CHU Nantes
    Nantes, France
    Recruiting
  • CHU Cochin- Port Royal, AP-HP
    Paris, France
    Recruiting
  • CHU Robert Débré, AP-HP
    Paris, France
    Recruiting
  • CHU Tenon
    Paris, France
    Recruiting
  • Hôpital Trousseau, AP-HP
    Paris, France
    Recruiting
  • CH Poissy
    Poissy, France
    Recruiting
  • CHU St Etienne
    Saint-Etienne, France
    Recruiting
  • CHU Caen
    Caen, France
    Withdrawn
  • CHRU Lille
    Lille, France
    Not yet recruiting
  • Hôpital St Joseph
    Marseille, France
    Withdrawn
  • CHRU Nancy
    Nancy, France
    Withdrawn
  • CHU Toulouse
    Toulouse, France
    Not yet recruiting
  • CHU Tours
    Tours, France
    Withdrawn

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

  • Pre-eclampsia risk in pregnancies after oocyte donation

    We will follow pregnant women who used donated eggs and women who used their own eggs to see if pregnancies after oocyte donation lead to a higher risk of pre-eclampsia.

    Recruiting at 6 sites Copenhagen University Hospital, Hvidovre · Copenhagen and 5 other locations · NCT07263490

  • Use of metformin to prolong pregnancy in preterm preeclampsia in the Netherlands

    In pregnant people with preterm preeclampsia, this study tests whether metformin can help them stay pregnant longer compared with placebo.

    Recruiting Phase 3 Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) · Amsterdam · NCT06452498

  • Identifying Women at Risk for Placental Dysfunction

    This study is trying to see if a new tool can help identify pregnant women at risk for placental problems by looking at their health information and blood tests.

    Recruiting Oulu University Hospital · Oulu · NCT06115122

  • Investigating cardiovascular risks in women after complicated pregnancies

    This study looks at how having high blood pressure during pregnancy might affect women's heart health later on and whether certain blood tests can help predict their risk for heart problems.

    Recruiting Maastricht University Medical Center · Maastricht · NCT05500989

  • Screening and planned delivery to prevent preeclampsia at term

    This study is testing a new blood test to see if it can help predict preeclampsia in first-time pregnant women and if inducing labor early can lower the chances of complications for both mom and baby.

    Recruiting at 8 sites Fundació Institut de Recerca de l'Hospital de la Santa Creu i Sant Pau · Liège and 20 other locations · NCT04766866

  • Using ultrasound to improve detection of fetal growth issues

    This study is trying to see if using ultrasound in a structured way can help doctors better spot babies that are not growing properly during pregnancy to reduce the risk of stillbirth.

    Recruiting Oxford University Hospitals NHS Trust · Oxford, Oxfordshire · NCT03662178

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.