Clinical Scorecard: Evaluation of Fetal Lung Development via MRI During the Omicron Phase of the SARS-CoV-2 Pandemic
At a Glance
Category
Detail
Condition
Fetal lung development impairment associated with maternal SARS-CoV-2 infection
Key Mechanisms
Variant-specific viral tropism affecting placental and fetal lung tissue; hybrid immunity from vaccination and infection
Target Population
Pregnant women with mild SARS-CoV-2 infection during the omicron-dominated pandemic phase
Care Setting
Prenatal care with fetal MRI imaging in specialized radiology departments
Key Highlights
Mild maternal SARS-CoV-2 infection during the omicron phase shows less severe placental changes and potentially less impact on fetal lung volume compared to earlier variants.
Omicron variant exhibits lower disease severity with reduced lower respiratory tract involvement, contributing to improved perinatal outcomes.
Hybrid immunity from vaccination and prior infections is prevalent and may influence fetal pulmonary development outcomes.
Guideline-Based Recommendations
Diagnosis
Use fetal MRI with standardized protocols to assess fetal lung volume in pregnancies affected by SARS-CoV-2 infection.
Confirm maternal SARS-CoV-2 infection via PCR or rapid antigen testing at symptom onset.
Management
Include pregnant and breastfeeding women in COVID-19 vaccination programs to promote hybrid immunity.
Monitor pregnancies with SARS-CoV-2 infection for potential placental and fetal lung involvement.
Monitoring & Follow-up
Perform fetal MRI at appropriate gestational ages (median ~33 weeks) to evaluate lung development.
Use blinded, independent radiologist assessment to ensure reliability of fetal lung volume measurements.
Risks
Mild maternal infection with omicron variant is associated with lower risk of adverse perinatal outcomes compared to pre-omicron variants.
Potential for placental infection and viral transmission to fetal lungs exists but appears reduced during the omicron phase.
Patient & Prescribing Data
Pregnant women with mild SARS-CoV-2 infection during the omicron variant predominance, mostly vaccinated
Majority received three vaccine doses prior to infection; no steroid or other fetal-damaging medications administered; mild symptoms predominated
Clinical Best Practices
Incorporate fetal MRI lung volume assessment in pregnancies with confirmed SARS-CoV-2 infection to monitor fetal pulmonary development.
Maintain vaccination efforts targeting pregnant women to reduce severity and improve perinatal outcomes.
Use standardized imaging protocols and blinded multi-reader assessments to ensure data accuracy and reproducibility.
Avoid medications during pregnancy that could harm placenta or fetus unless clinically indicated.
by Gloria Biechele, Vanessa Koliogiannis, Philippe Rennollet, Tobias Prester, Enrico Schulz, Thomas Kolben, Magdalena Jegen, Christoph Hübener, Uwe Hasbargen, Andreas Flemmer, Olaf Dietrich, Tanja Burkard, Regina Schinner, Julien Dinkel, Maximilian Muenchhoff, Susan Hintz, Maria Delius, Sven Mahner, Jens Ricke, Anne Hilgendorff, Sophia Stoecklein
