Clinical trial Recruiting at 1 site Observational Ages 18 to 40 Women only

Investigating blood vessel changes during pregnancy

Official title: Angiotensin 2 Receptor (AT2R) Expression/Activation in Endothelial Cells in Preeclampsia

Run by University of Wisconsin, Madison · NCT03806283 · Data updated 2026-11-12

This study is trying to see how blood vessels change during pregnancy in women with and without preeclampsia by looking at tissue samples taken during cesarean sections.

Quick facts

Study typeObservational
Ages18 Years to 40 Years
SexWomen only
Enrollment166 (estimated)
SponsorUniversity of Wisconsin, Madison
Academic / other
Locations1 site (Madison, Wisconsin)
StatusRecruiting
StartedNovember 20, 2018
Main results expectedApril 2027
Study endsApril 2027
Registry record updatedJanuary 20, 2026
Trial IDNCT03806283 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are pregnant women aged 18 to 40, undergoing a cesarean section, and diagnosed with or without preeclampsia.

Probably not a fit

Patients with preexisting hypertension, major fetal anomalies, or other significant underlying health conditions 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 compare the vascular adaptations in pregnant women with and without preeclampsia by collecting omental and placental tissue during cesarean sections. The research will focus on the expression and activation of the AT2 receptor and its role in vascular function and dysfunction. A total of up to 114 pregnant women will be enrolled, with the option to provide one or both types of tissue specimens. The study will analyze the collected samples to understand fetal vascular dysfunction associated with preeclampsia.

Why it matters

Potential benefit: If successful, this study could lead to improved understanding and management of preeclampsia, potentially enhancing maternal and fetal health outcomes.

How similar studies have gone: While this study explores specific mechanisms in preeclampsia, similar studies have shown promise in understanding vascular adaptations during pregnancy.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Female
* Ages 18 to 40 years old
* Singleton gestation between 28 weeks, 0 days and 41 weeks, 0 days gestational age at the time of consent
* Undergoing caesarean section, either planned or otherwise with or without trial of labor

Exclusion Criteria:

* Treatment of severe hypertension by antihypertensive or use of magnesium sulfate after the patient is hospitalized for the diagnosis of preeclampsia.
* Any major fetal structural anomalies or aneuploidies
* Undergoing cesarean section for placental abruption or bleeding complications.
* Singleton gestation not within 36 weeks, 0 days and 41 weeks, 0 days gestational age at the time of enrollment (delivery)

Where it's running

  • UnityPoint Health-Meriter Hospital
    Madison, Wisconsin, United States
    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.