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Predicting Labor: The Power of Angiogenic Biomarkers

•Posted inObstetrics and Gynaecology
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Predicting Labor: The Power of Angiogenic Biomarkers

Angiogenic serum biomarkers are becoming essential tools in modern obstetrics. These markers help doctors understand the timing of spontaneous and induced labor more precisely. A recent prospective study investigated sFlt-1 and PlGF levels in low-risk pregnancies. Findings show that higher sFlt-1 levels and sFlt-1/PlGF ratios correlate with a shorter time to delivery. Therefore, these biomarkers provide a biological signal of approaching labor. This research offers a new way to monitor term and post-term pregnancies without invasive procedures.

Clinical Utility of Angiogenic Serum Biomarkers

The study evaluated biomarker changes from term to post-term gestation. In spontaneous labor cases, the sFlt-1/PlGF ratio remained a significant predictor even after adjusting for maternal BMI and parity. Furthermore, PlGF levels notably declined as pregnancies moved into the post-term phase. This decline highlights the shifting placental environment at the end of pregnancy. Additionally, higher PlGF levels in induced labor cases showed a link to longer intervals before delivery. Consequently, clinicians might use these values to set better expectations for induction success. These biomarkers improve our ability to predict the onset of parturition.

Managing Post-Term Pregnancies

Managing post-term pregnancies requires precise timing and careful monitoring. The research demonstrates that angiogenic markers shift significantly during this period. For instance, the sFlt-1/PlGF ratio increases as the delivery date approaches. This trend suggests that placental aging or signaling triggers the labor process. Moreover, these findings apply specifically to low-risk pregnancies. As a result, this data bridges the gap in our understanding of normal labor physiology. Doctors can now look toward these biomarkers to refine their clinical assessments and improve patient counseling during the final weeks of pregnancy.

Frequently Asked Questions

Q1: Do higher sFlt-1 levels mean labor will start sooner?

Yes, the study indicates that higher sFlt-1 levels and higher sFlt-1/PlGF ratios are inversely correlated with the time remaining until spontaneous labor begins.

Q2: How does PlGF change in post-term pregnancies?

PlGF levels typically decline when a pregnancy moves from term to post-term gestation, reflecting a natural shift in the angiogenic profile of the placenta.

Q3: Can these biomarkers predict the success of labor induction?

The research found that higher PlGF levels were associated with longer induction-to-delivery intervals, suggesting these biomarkers may help predict how quickly a patient responds to induction.

References

  1. Morr AK et al. Angiogenic Serum Biomarker Levels Are Related to Onset of Labour in Low-Risk Term and Post-Term Pregnancies: A Prospective Observational Cohort Study. BJOG. 2026 Mar 27. doi: 10.1111/1471-0528.70231. PMID: 41895736.
  2. Levine RJ, et al. Circulating angiogenic factors and the risk of preeclampsia. N Engl J Med. 2004;350(7):672-683.
  3. Verlohren S, et al. The sFlt-1/PlGF ratio in different types of hypertensive pregnancy disorders and its prognostic potential in preeclampsia. Am J Obstet Gynecol. 2012;206(1):58.e1-8.