Early pregnancy assessment in multiple pregnancies.

Area of Science:

• Maternal-Fetal Medicine
• Diagnostic Imaging
• Perinatology

Background:

• Multiple pregnancies require specialized care, with early assessment crucial for optimal outcomes.
• Accurate determination of chorionicity in early pregnancy is essential for risk stratification and management.
• Twin pregnancies face increased risks of complications such as selective intrauterine growth restriction and congenital anomalies.

Purpose of the Study:

• To emphasize the critical role of early ultrasound in determining chorionicity.
• To highlight the importance of accurate fetal measurement and labeling for monitoring growth.
• To discuss the diagnosis and management of major complications in monochorionic twins.

Main Methods:

• Utilizing Lambda ('λ') and 'T' signs on first-trimester ultrasound for chorionicity determination.
• Ensuring accurate twin labeling for consistent longitudinal growth assessment.
• Detailed review of diagnostic criteria and prognostic factors for twin-specific complications.

Main Results:

• Early ultrasound with Lambda and T signs accurately determines chorionicity.
• Discrepancies in crown-rump length may predict selective intrauterine growth restriction.
• Early identification of complications like twin-to-twin transfusion syndrome and TRAP sequence is key.

Conclusions:

• First-trimester ultrasound is paramount for diagnosing chorionicity and guiding multiple pregnancy care.
• Accurate monitoring of fetal growth and early detection of anomalies are critical for improving perinatal outcomes.
• Timely intervention for conditions like twin-to-twin transfusion syndrome and TRAP sequence can enhance prognosis.