Clinical trial Recruiting at 1 site Observational Ages 18 and up Women only

Effects of low dose aspirin on immunity during pregnancy

Official title: Immunomodulation During Pregnancy Through Low-Dose Aspirin: a Hypothetical Mechanism for the Prevention of Preeclampsia?

Run by Unidade Local de Saúde de Coimbra, EPE · NCT06882850 · Data updated 2026-11-12

This study is testing how low dose aspirin affects the immune system in pregnant women who are at high risk for preeclampsia to see if it helps improve their health and the health of their babies.

More Pregnancy Complications trials

Quick facts

Study typeObservational
Ages18 Years and up
SexWomen only
Enrollment30 (estimated)
SponsorUnidade Local de Saúde de Coimbra, EPE
Academic / other
Locations1 site (Coimbra, Coimbra District)
StatusRecruiting
StartedFebruary 1, 2024
Main results expectedMarch 30, 2025
Study endsMarch 31, 2025
Registry record updatedMarch 19, 2025
Trial IDNCT06882850 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are pregnant women with singleton pregnancies classified as high risk for preeclampsia who have not previously taken low dose aspirin.

Probably not a fit

Patients with multiple pregnancies, autoimmune diseases, or a history of spontaneous miscarriages 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 observational study aims to evaluate how low dose aspirin (LDA) affects the immune system in pregnant women at high risk for preeclampsia (PE). It will assess the modulation of various immune cells and quantify pro-inflammatory and anti-inflammatory cytokines before and after LDA administration. The study will include singleton pregnancies monitored at the Centro Hospitalar e Universitário de Coimbra, with participants classified as high-risk for PE based on specific clinical criteria. The study will last between 40 weeks and 24 months, focusing on maternal and fetal outcomes in comparison to low-risk pregnancies.

Why it matters

Potential benefit: If successful, this study could provide insights into how low dose aspirin may improve immune responses and pregnancy outcomes for women at risk of preeclampsia.

How similar studies have gone: While this approach is observational and builds on existing knowledge of aspirin's effects, similar studies have shown promising results in understanding the immunological impacts of aspirin during pregnancy.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria: - Singleton pregnancy

* Patients attending prenatal consultations at the Obstetrics Service A of CHUC, with the first consultation occurring before 14 weeks of gestation
* Gestational age determined by first-trimester ultrasound
* Study group: Women classified as high risk for PE according to clinical/historical criteria and the Fetal Medicine Foundation algorithm. LDA-naïve.

Exclusion Criteria: Multiple pregnancy

* Autoimmune diseases
* Prior use of LDA or other immunomodulatory medication before potential recruitment
* History of spontaneous miscarriages and/or medical termination of pregnancy
* Fetal malformation

Where it's running

  • Unidade Local de Saúde de Coimbra, E.P.E.
    Coimbra, Coimbra District, Portugal
    Recruiting

Study contacts

Similar studies

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

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.