Preeclampsia and Your Kidneys: What the Long Term Studies Reveal
"New research sheds light on how preeclampsia affects kidney health years after pregnancy, offering insights for prevention and monitoring."
Preeclampsia, a condition affecting 3-10% of pregnancies, is more than just a pregnancy complication. It's a significant risk factor for both maternal and perinatal health, increasing the likelihood of preterm birth and low birth weight. Beyond the immediate risks, preeclampsia can have lasting effects on a mother's health, particularly concerning her kidneys.
While factors like maternal age, socioeconomic status, and pre-existing conditions such as obesity, hypertension and diabetes are known to elevate the risk of developing preeclampsia, the long-term consequences have been a subject of ongoing research. Scientists have been actively searching for biomarkers that can predict and improve the diagnosis of preeclampsia, yet reliable screening methods remain limited.
A new study investigates the connection between preeclampsia and future kidney health by monitoring specific biomarkers in women who have experienced preeclampsia, compared to those with normal pregnancies. This research focuses on markers like urinary podocalyxin, proteinuria, and serum creatinine to assess how kidney function changes over time.
Prevalence and Long-Term Kidney Questions
A source on postpartum kidney disease reports that preeclampsia and gestational hypertension affect over 1 in 8 pregnancies in the United States. It notes that gestational hypertension differs, in part, because it is not associated with proteinuria, and says it remains unclear whether the two conditions carry different risks of subsequent kidney disease. Separately, researchers note that data on long-term preeclampsia-related kidney outcomes remain scarce in low- and middle-income countries; their study assessed incident hypertension, kidney dysfunction, and albuminuria after preeclampsia.
Care After Preeclampsia
A comprehensive review says current preeclampsia management guidelines focus on controlling high blood pressure and addressing potential complications. A separate review describes postpartum medical investigation as essential, while noting that long-term follow-up may not be indicated when there are no underlying conditions. It says prospective studies are needed to clarify the relationship between preeclampsia and kidney disease in women who were healthy before pregnancy. A retrospective cohort study followed 103 pregnant patients with chronic kidney disease (CKD) and preeclampsia and 103 matched CKD patients without preeclampsia for at least one year after their first pregnancy.
From Early Descriptions to Open Questions
A historical account traces descriptions of preeclampsia from the earliest recorded definition by Hippocrates around 400 BC through milestones leading to today’s understanding and remaining challenges in diagnosis and management. Modern research still examines whether preeclampsia is a marker or a cause of chronic kidney disease (CKD). A 2021 retrospective study assessed preeclampsia prevalence among women who underwent kidney biopsy to test a proposed biphasic relationship between preeclampsia and CKD.
What is Podocalyxin and Why Does It Matter?
Podocytes are specialized cells in the kidneys that are essential for filtering waste products from the blood. Typically, these cells are absent or found in very small numbers in the urine of healthy individuals. However, in conditions like preeclampsia, damage to the podocytes can lead to an increased presence of these cells in the urine, a phenomenon known as podocyturia.
- Podocalyxin: A protein found on the surface of podocytes, crucial for maintaining kidney filtration.
- Preeclampsia: A pregnancy complication characterized by high blood pressure and signs of organ damage, often affecting the kidneys.
- Podocyturia: The presence of podocytes in the urine, indicating potential kidney damage.
Review Finds Elevated Long-Term Risk
A systematic review published in 2025 concluded that women with a history of preeclampsia have a greater risk of chronic kidney disease or end-stage kidney disease. The review reports that some determinants appear to increase the risk. It also concludes that further research is needed to identify the determinants of kidney sequelae.
Limits in the Evidence Base
One systematic review and meta-analysis reported high heterogeneity and selected a random-effects meta-analytic model. Another review evaluated 4,149 studies and included 35 articles, but only 3 studies reporting CKD outcomes and 6 reporting end-stage renal disease (ESRD) outcomes had the data needed for its meta-analysis. These reported limitations show that the pooled evidence draws on a smaller subset of studies with usable outcomes and that results varied across studies.
Association Does Not Establish Cause
A 2025 review notes that previous studies and meta-analyses found an association between preeclampsia and later chronic kidney disease or end-stage kidney disease. It says it remains unclear whether this relationship is causal. The review frames that unresolved question as a central issue in understanding the long-term kidney implications of preeclampsia.
What This Means for You
While the study offers reassuring evidence that kidney function tends to normalize in most women after preeclampsia, it also highlights the importance of long-term monitoring. Consistent with other studies, the research confirmed higher levels of urinary podocalyxin and protein during pregnancy in those with preeclampsia. Although these levels decreased over time, two patients in the preeclampsia group still had proteinuria three years postpartum, underscoring the need for continued vigilance. If you have a history of preeclampsia, regular check-ups and kidney function tests are essential to ensure early detection and management of any potential issues.
A Shift Beyond Delivery
A 2019 review describes preeclampsia as a pregnancy-related syndrome of variable severity, classically involving acute kidney involvement, hypertension and/or proteinuria, and reduced kidney function. It says the condition was once considered self-limited and healed by delivery. The review describes a shift in understanding: preeclampsia is now acknowledged to affect cardiovascular and kidney health in the long term.
Follow-Up Research Across Settings
A study using the Geisinger Health system examined whether preeclampsia-complicated deliveries were associated with future hypertension, reduced estimated glomerular filtration rate (eGFR), and albuminuria. Its authors describe long-term kidney-outcome data from low- and middle-income countries as scarce, despite hypertensive disorders of pregnancy affecting approximately 10% of pregnancies and causing disproportionate morbidity and mortality in those settings. Together, these sources identify both specific outcomes under study and a geographic gap in the evidence.