Antiphospholipid Syndrome and Postpartum Pulmonary Artery Pressure

This study is measuring blood pressure in the lungs (pulmonary artery pressure) after childbirth in women who experienced preeclampsia during pregnancy. Researchers also want to understand whether an antibody condition called antiphospholipid syndrome plays a role in complications affecting the heart and lungs after a preeclamptic pregnancy. **You may be eligible if...** - You are 16 or older - You were diagnosed with preeclampsia during your pregnancy (defined as new high blood pressure after 20 weeks along with protein in urine or other organ involvement) - You are receiving follow-up care at the relevant obstetric and cardiology clinic in Bern, Switzerland **You may NOT be eligible if...** - You are under 16 years old - Your medical records are incomplete or unclear enough to confirm diagnosis or analyze the main outcome Talk to your doctor to see if this trial is right for you.