Pilot Study of Microvesicles in Pre-eclamptic and Non-pre-eclamptic Women With Threatened Preterm Delivery

This study is investigating tiny particles in the blood called microvesicles in pregnant women who are at risk of early labor. Researchers want to understand whether these particles differ between women with and without preeclampsia (a serious pregnancy complication involving high blood pressure), which could help develop better diagnostic tools. **You may be eligible if...** - You are at least 18 years old - You are pregnant with a single baby, between 23 and approximately 32 weeks along - You are hospitalized for threatened preterm labor without signs of infection (non-preeclampsia group), OR you have been diagnosed with severe preeclampsia before 32 weeks (preeclampsia group) **You may NOT be eligible if...** - You are unable to understand what the study involves or decline to participate - You are under legal protection that limits your ability to consent Talk to your doctor to see if this trial is right for you.