Placental Thickness Correlates with Severity-Weighted Fetal Dysfunction in the Third Trimester

Area of Science:

• Perinatal Medicine
• Fetal Cardiology
• Medical Imaging

Background:

• Placental thickness is linked to adverse perinatal outcomes, but its relation to specific fetal abnormalities requires further understanding.
• Existing research has not fully elucidated the correlation between placental thickness and the severity of fetal cardiac and extracardiac conditions.

Purpose of the Study:

• To investigate the correlation between increased placental thickness and the severity of fetal cardiac and extracardiac conditions.
• To utilize a structured classification and severity-weighted scoring system to assess fetal abnormalities.

Main Methods:

• Retrospective analysis of 1452 third-trimester fetal echocardiograms (2022-2025).
• Categorization of diagnoses into congenital heart anomalies, cardiac dysfunctions, extracardiac malformations, and extracardiac dysfunctions.
• Placental thickness classified as thin (≤40 mm), intermediate (41-69 mm), and thick (≥70 mm); correlation analysis using Spearman's ρ.

Main Results:

• Moderate positive correlation between placental thickness and weighted extracardiac dysfunctions (ρ = 0.36, p < 0.00001).
• Weaker but significant association between placental thickness and cardiac dysfunctions (ρ = 0.13, p = 0.01).
• Fetuses with thick placentas (≥70 mm) showed higher mean scores for cardiac and extracardiac dysfunctions.

Conclusions:

• Augmented placental thickness correlates with increased fetal dysfunction, especially extracardiac and functional cardiac impairments.
• Placental thickness measurement can be a simple, supplementary indicator of third-trimester fetal distress.
• This finding may enhance early detection when used with targeted imaging.